Rijnsburg, a municipality in the province of South Holland, was originally a castle situated on a sharp bend of the Oude Rijn,
which probably formed part of the allodial estates of the Counts of Holland (Holland, county). As evidenced by the inscription
RINESBURG on the coins, coins were minted there, possibly by Dirk IV of Holland (1039–1049) or his brother Floris I (1049–1061).
In 1047, Rijnsburg was destroyed by Emperor Henry III during an expedition against Godfrey of Lorraine.