Analysis of information sources in references of the Wikipedia article "Rotterdam" in English language version.
The habitation phase [...] starts in the middle of the 10th century (circa 950) and continues until [...] around the middle of the 11th century (circa 1050-1060). (translated)
The habitation phase [...] starts in the middle of the 10th century (circa 950) and continues until [...] around the middle of the 11th century (circa 1050-1060). (translated)