Overijssel
Overijssel (meaning “on the other side of the IJssel river”) in the east of the Netherlands was part of Utrecht until in 1528 the Spanish King Charles V, as count of Holland, inherited the area. As a result the flag of the province still has the colours of the arms of Holland (a red lion on a yellow background). The blue wavy line represents the IJssel river, terminating in the IJsselmeer, the former Zuider Zee. The flag was officially adopted on 21 July 1948.