In 1902, Vršovice obtained the status of a city, and in the same year, the Waldes Koh-i-noor factory for the production of famous pencils and other stationery was opened. Craft production gave way to industry, and with gradual industrialization, the appearance and character of the area changed. In 1903, a mill with a bakery was established in what was then Brožíkova Street, now Petrohradská Street. However, in 1937, instead of sourdough, cocoa beans were brought into the corner building, and the mill was replaced by a chocolate factory. In the 1950s, the chocolate factory and a candy store gave way to an assembly workshop. At the beginning of the 21st century, the building lost its purpose entirely. In the future, a residential new building is planned for the corner, but until then, Petrohradská Kolektiv breathes life into the abandoned building. This initiative revived the worn-out Neo-Renaissance facade with black and white silhouettes, but more importantly, it found temporary use for the interior spaces. It fills the individual rooms and inner courtyard with culture and creative people. Although Petrohradská Kolektiv has created a great cultural hub in the buildings, unfortunately, at the end of 2023, they are scheduled to be demolished entirely.