Sister castle
A sister castle or twin castle relationship is the castle equivalent of sister city, between two geographically distinct castles, usually by agreement between two local governments famous for castles.
Some Japanese castles establish sister relationships with not only domestic castles but also European castles.
Details
On 26 March 2015, Conwy Castle in Wales was twinned with Himeji Castle. Both castles are World Heritage Sites.The term friendship castle alliance is also used, but it is distinguished from sister castle like the examples of Himeji Castle and Osaka castle.
List of sister castles and friend castles
| Sister castle relationship | |
| Friendship castle alliance |