Besides the workers’ colonies of the old mine “Joanna” and the iron factory “Julia” in Bobrek, “Kolonia Zgorzelec” is the best preserved workers’ housing estate in Bytom. The historical buildings of the Zgorzelec Colony can be found in the southern district of Bytom - Łagiewniki. They were built at the turn of the 19th and 20th centuries for the families of the workers of the iron factory "Hubertus", later known as "Zygmunt." After 1989, the housing estate was partially revitalized.