Postindustrial agglomerations struggling with image deficits and environmental problems are looking for new development paths to take. One of these paths can bring about the development of business tourism, including the industry of the organisation of meetings and events. The unique and attractive character of the place can favour taking such a direction. The business tourism sector can therefore become an instrument contributing to the sustainable metropolisation of the city by building up its position in the global network of flows. The development of the meetings and events sector allows, therefore, for a change of image, for a re-evaluation of endogenous resources, including those relating to the industrial past, and for tapping into the unlimited resources of the global network. Increased attention in this network may lead to an influx of more events, and of investors as well. Replacing heavy industry with an enlarged service sector and modern industry based on flexible and innovative small and medium-sized enterprises fosters sustainable development. The meetings and events industry can become a tool for sustainable development and the promotion of its ideas, related to the UN Sustainable Development Goals (SDGs). The trajectory outlined above seems very promising. However, to some extent, it is just a hypothesis. The author undertakes to test it on the example of Katowice, a former industrial city which has decided to follow the route outlined above to become a city that hosts many events, including the COP24 summit in 2018. In the article, the author presents empirical research studies whose authors tried to determine whether the path the city has chosen has a real impact on its image and development. The author also deals with the question of the sustainability of such a development path and the conditions for its self-support in the context of the COVID-19 pandemic crisis.