The activities of Pop-up-to-Date pivot around the conversion of vacant commercial properties into springboards for creative entrepreneurship. Supporting pop-up shops is not an innovative solution for transforming run-down neighbourhoods into vibrant city districts. Many local authorities experiment with pop-up policies. Very few, however, have an encompassing approach such as Antwerp (BE), for linking creative entrepreneurs to vacant retail units, which has been proven to work and produces lasting effects on both district and city level. The integrated multi-stakeholder approach displayed in Antwerp's Oud Berchem neighbourhood has proven to be an effective as well as inspiring methodology to transform a depreciated shopping area into a lively axis of creativity. The success ratio for the conversion of vacant retail units stands at 70%, with 60% of the units being long-term rented, and 10% being sold to entrepreneurs.

The activities of Pop-up-to-Date pivot around the conversion of vacant commercial properties into springboards for creative entrepreneurship. However, what’s most essential is the radical choice for a collaborative multi-stakeholder approach, which brings together different government levels, entrepreneurs, non-profit actors and local inhabitants. In this project, the local government takes up a role as enabler and funder. Non-profit organisations build on their close links with local communities and property owners to match vacant properties with creative entrepreneurial spirits. The approach starts with identifying the owners of vacant retail units on the one hand, and creative entrepreneurs on the other hand. The vacant retail unit is rented by a non-profit organisation on behalf of the local authority. Because the focus lies on decayed properties, it is lightly refurbished by means of local government funding prior to the rental period. During a fixed time frame of two months, it is then provided at a reduced tariff to starting creative entrepreneurs to try out their business in a real-life environment. After the project period, the profitability of the business and further ambitions of the starting entrepreneurs are evaluated, and customised coaching and counselling are made available.

Supporting pop-up shops is far from being an innovative solution for transforming run-down neighbourhoods into vibrant city districts. Many local authorities experiment with pop-up policies. Very few, however, have an encompassing approach in linking creative entrepreneurs to vacant retail units, which has been proven to work and produces lasting effects on both district and city level. The integrated approach of the project in Oud Berchem is exemplary for the horizontal and vertical integrated approach championed by URBACT. Horizontal integration results from multiple stakeholders joining forces to provide a mix of policy measures, ranging from financial stimuli, direct support by refurbishing retail units, coaching and matchmaking activities, aftercare through mediation between entrepreneurs and property owners to local community building activities (e.g. a quarterly neighbourhood newspapers, workshops etc.) and neighbourhood marketing. The soft measures in this project fit into a broader neighbourhood oriented strategy, involving ‘hard’ ERDF investments to increase the attractiveness of the shopping area in Oud Berchem and stimulate owners to renovate their commercial properties. Vertical integration is found in the expanding cooperation between the local authority, intermediary non-profit organisations, the Regional Government Agency for Entrepreneurial Education and different local stakeholders at the neighbourhood level.

In the original set-up, the local government worked in collaboration with and funded, LCB vzw (a local government non-profit organisation for local cultural policy) to match entrepreneurs and owners. The original funding scheme was elaborated in close cooperation with the local shopkeeper association. At any stage of the process, very close relationships were established with the involved creatives. Inspired by the results during the first editions of the biennial project, a new non-profit organisation, Creative Cities vzw, was created by local entrepreneurs. Creative Cities vzw has gradually developed complementary activities by providing starter coaching and mediation between owners and creatives following the two-month rental period. Due to their involvement, the impact of the project in terms of the number of retail units and entrepreneurs involved has increased. LCB vzw and Creative Cities vzw have concluded a cooperation agreement to further fine-tune their partnership and maximise their collaborative impact towards Oud Berchem. Also, the involvement of Creative Cities vzw has taken the project to a new level by creating structural partnerships with SYNTRA (the regional Flemish Government Agency for Entrepreneurial Training) and UNIZO (Organisation for the Self-Employed and SMEs). A next step is the approved ESF Transnational funded project “The Suburb Start-up Guide”, in which a higher education institute is involved by analysing the policy measures.

After three successful editions, the results are remarkable: • The success ratio for the conversion of vacant retail units stands at 70%, with 60% long-term rented units and 10% of units sold to entrepreneurs. • The streetscape has visually improved due to the refurbishment of the commercial properties, which has raised the districts' appeal. • A majority of the entrepreneurs involved (18 so far, and 10 newcomers in 2017) have reported having either started a permanent shop in the city or are continuing their activities on a freelance basis or through web shops. Networks among the entrepreneurs involved outlive the project periods. • New qualitative retailers are opting for long-time residence in the refurbished units. • Native middle-class consumers are starting to visit traditional migrant shops, while local migrant property owners are renting out their properties to young creative multicultural entrepreneurs. • The commercial success of flourishing pop-ups has also inspired owners not involved in the project, to refurbish their own retail units and/or try out new innovative business concepts. • Other city districts and cities in Flanders are interested in or have already adopted, the project’s ideas. • The project has been displayed by the local and supralocal press, thus contributing to a positive image of the neighbourhood. • The neighbourhood now functions as an incubator for spilling over new retail entrepreneurs to other city districts.

Creative placemaking is applied by many European cities as a method to both tackle building vacancy and foster entrepreneurship. Similar suburbs often harbour an equivalent of the creativity and diversity found in Oud Berchem. The power of the approach presented here lies in the win-win situation in which owners, creative entrepreneurs, local residents and local traders all benefit from the pop-up activities. This coalition of the winning provides a fertile ground on which the involved creative entrepreneurs can flourish. An important success factor is the involvement of a local cultural stakeholder like an arts centre, a community centre or local cultural or arts organisations. Its role is to monitor the artistic quality of the project, which largely determines its attractiveness for potential creatives. The project will work particularly well in urban or suburban areas with a pronounced neighbourhood character and easy access to public transport. The local authority needs to ensure local anchorage through close cooperation with all involved stakeholders. Likewise, it needs to develop a ‘feeling’ of how the area functions. To succeed, the organising city needs to build on its knowledge of the creative economy to generate qualitative commercial concepts that are able to attract visitors across neighbourhood/district boundaries.

The City of Aarhus (DK) has been testing the method of including young people in the redevelopment of empty buildings since 2013. By working with physical temporary use, for instance an empty municipal building the future use of which has yet to be determined, the city is forced to continually rethink the involvement of citizens, format and content in relation to its development. The method has been applied successfully to a youth community centre. A place has been created for people aged 15-25, who organise themselves through a management group and monthly public youth council meetings. The method can be applied to other areas, where citizen and civil society involvement in the solution of social challenges is desired.

One solution is to turn young people into citizens who contribute to society, instead of working against it. Our method is to include citizens in cultural productions and activities to create a community aimed at solving issues such as the inclusion of vulnerable young people and youth unemployment. We have temporarily reactivated an empty building as a youth community centre, where young people are invited to come in and have their say about the physical settings and content. It gives them a sense of ownership, because the place is created on their terms. The deal is that the centre must be developed in close collaboration between the young people and the municipality staff working at the centre. By being close to the young people, we can nudge them towards an education or a job and avoid total anarchy, as has been seen at other self-proclaimed youth centres. Another solution is that young people become active citizens. They are better prepared to take responsibility for their own lives and to participate in society on an equal footing with others. We work with values such as appreciation, trust and responsibility to make the young people recognise and develop their own strengths, which help them believe that they can make a difference. A third solution is that by re-activating empty buildings, we prevent them from being occupied illegally, or left to fall into disrepair, while indicating new possible functions and, alternatively, contributing to gathering knowledge that can be used in other places.

Horizontal integration: a physical element, e.g. an empty building, is used to prevent it from falling into disrepair. It is then linked to an issue, for instance within the social area, as in the case of the youth community centre. Cultural activity is added to attract citizens, and make them join a process of co-creation with the municipality. Vertical integration: various municipal services collaborate closely with the civil society. In the case of the youth community centre, participants include young citizens, educational institutions and youth organisations. The method is based on participation as an integrated and leading strategy. Through co-creation, mutual trust based on community as a sense of 'we' is built between the young people and the municipality. The foundation builds core values like trust and respect that help create sustainable social development in the city. Territorial integration: what works is flexibility, trying out things in practice and in a temporary context, rather than working with permanent solutions. A better knowledge of the city's physical spaces and their future possible uses allows finding better solutions to needs and challenges that are also more adjustable than permanent choices. We achieve sustainable development by using unexploited resources such as empty buildings and areas, which we temporarily reactivate.

The following elements are clear evidence of a participatory approach in the Youth Community Centre project:

• Young people have been involved from the very beginning in steering groups, and in the practical organisation of activities;
• From the outset, young people were involved in workshops with administrative staff and educational institutions, in order to make them participate in the project and define its aim;
• The Youth Community Centre was managed from the start by representatives from various local government areas, and from youth environments of Aarhus. Today, the centre has former participants as representatives in the steering group;
• So far, the centre has had three temporary locations. The buildings were furnished by young people, who also proposed activities, and therefore reflected the young people who were using the centre at any given time. In the beginning, several young people with an interest in construction were involved in the physical transformation of the building. When young musicians discovered the centre, they set up a music studio. A group of punk rockers have joined in, and punk rock concerts are now held frequently. The municipality staff on site assists the young people's entrepreneurial efforts and activities, and promotes the place to other young people, educational institutions and those who work with young people.

The method has been applied successfully in building a Youth Centre that houses several collaborating interest and identity communities. There, young people aged 15-25 have put together a management group and monthly public youth council meetings. Political awareness is now raised to the need for a new temporary location for the Centre, resulting from demonstrating that it is possible to run a youth community centre as a collaborative effort, involving both young people and local governments. Without an available temporary building, this new experience would not have been possible, nor attracted any political attention. The City of Aarhus' Children's and Youth City Council actively supports the Youth Community Centre and is working to find a solution to the need for a location and municipal part-financing for the centre. The area of the actual building used to be deserted in the evening, used mainly for cannabis smoking and as a place for homeless people to spend the night. Today, the area is welcoming and open for cultural activities such as graffiti, volleyball and urban gardening. The method is also being tested for the development of a new urban area in temporary buildings around the old Freight Yard, where some 100 businesses have emerged, many of which focus on culture and environmental sustainability.

Our method might interest other cities in Europe since it is based on a different approach to finding common solutions to social issues by a close collaboration between local authorities and civil society. In addition, we solve the problem of empty buildings falling into disrepair, by re-activating them temporarily for new purposes. The core asset is culture, which is strategically used to build bridges between the municipality and citizens, thus facilitating dialogue. Most major cities have empty buildings that can be re-activated if there is a political will to do so. Considering their large populations, issues could be examined in different ways, and better solutions be found. Many challenges and issues can be addressed in a different, inclusive way if empty buildings are reemployed. For instance, Europe is facing great challenges in terms of refugee integration. The Youth Community Centre has been particularly successful in this respect, as it has been able to invite young refugees to become a part of the Centre, on equal terms with other young people. Cities develop in a positive way when citizens create communities in new physical settings where cultural activities can be developed. Unexploited spaces become a shared responsibility to a greater extent.