The castle Ruwiel was located in Oud-Aa, however it was destroyed in 1673 by the French, and now contains a farm. In 1840, it was home to 315 people. There also was a local former municipality called Ruwiel.
Ruwiel Castle, located in Oud-Aa, was demolished by the French in 1673. Today, it serves as a farm.  In 1840, the area had a population of 315 people. The former municipality of Ruwiel also existed nearby.