Historic Beaumaris Courthouse on Castle Street, which was built in 1614. It is one of the oldest surviving courthouses in the United Kingdom and is located right next to Beaumaris Castle.The building is a designated Grade II listed structure. While it retains its Stuart-era layout, it was enlarged in the early 19th century with a polygonal grand jury room and utilitarian additions. It remained an active court until 1996 and is now preserved as a museum.