During the digging of the foundations for the Monument to Prince Michael in 1882, tombs from different periods of Roman rule were discovered. One tomb was made from bricks, and there were 13 circular and 2 rectangle grave pits. Some of them are "well-tombs", named so because they are more than deep. The "well-tombs" are rare in these areas and it is believed that the custom arrived from Gaul. The brick tomb, which contained rushlight, was discovered close to the Čika Ljubina Street, while the other pits were where the monument is today. The materials found in the tombs include pottery fragments and vessels, pieces of terracotta and stone statues, fan-shaped floor tiles, bronze and bone needles, bricks, rushlights, etc. The pits were filled with ashes and contained animal bones. Coins and bronze rings, parts of the armor, have also been discovered. These "well-tombs" are considered to be the oldest part of the vast Singidunum necropolis, originating from c.100 AD, while the brick tomb is dated to c.400 and some of its bricks have a stamp of the Legio IV Flavia Felix. During the 2018-2019 renovation, two additional, devastated tombs were discovered.