In the page's words:

The ArGe Vorgartenflohmarkt has been organizing the largest front garden flea market in Cologne on a voluntary basis for many years.

By Mauenheimers - for Mauenheimers | To promote the social community in Cologne's smallest neighborhood, the village within the city.

The participants are exclusively residents of the Veedel who are jumbling around in their private front gardens.

Every year, the proceeds from the advertising costs are donated to a social project in the Veedel.

https://Vorgartenflohmarkt.INFO/