The Poznań market square was laid out in the mid-thirteenth century as a square with a side of 141 meters. The outer tenement houses belonged to wealthy townspeople. The internal buildings are the town hall, the municipal weigh building, guardhouse, arsenal and construction houses. The fact that the houses are visible because they are narrow. What we see today are post-war reconstructions. Their ancestors came from the 16th century. Why are they called builders? Lesser merchants lived and traded here. These houses were called herring stalls. One of these tenement houses was the seat of the Brotherhood of Builders, i.e. traders in huts. In the photo montage we have views of them from two perspectives.