Notable buildings in the town include the castle , a courthouse built in 1614 , the 14th century St Mary 's parish church , Beaumaris Gaol , the 14th-century Tudor Rose ( one of the oldest original timber-framed buildings in Britain ) and the Bulls Head Inn , built in 1472 , which General Thomas Mytton made his headquarters during the `` Siege of Beaumaris '' during the second English Civil War in 1648 .
Notable buildings in the town include the castle , a courthouse built in 1614 , St Mary 's parish church , and the town gaol .