Large Roman fort built by Caligula discovered near Amsterdam

An illustration of the first Roman fort in Velsen. Archaeological evidence was first uncovered in 1945 by schoolchildren who found shards of pottery in an abandoned German anti-tank trench. Photograph: Graham Sumner

An illustration of the first Roman fort in Velsen. Archaeological evidence was first uncovered in 1945 by schoolchildren who found shards of pottery in an abandoned German anti-tank trench. Photograph: Graham Sumner

source https://www.theguardian.com/world/2021/dec/26/roman-fort-built-by-caligula-discovered-velsen-near-amsterdam