Thehistoryblog.com - Massive 10th c. walls points to first Poland capital
05.07.2020
"Archaeologists have unearthed a large section of a 10th century defensive wall in Poznań, central Poland. Excavations in advance of construction of a new apartment building discovered the massive stone, sand and wood wall 23 feet below current ground level. At 130 feet wide and 40 feet high, it is the largest medieval defensive wall ever found in Poland."