The Admiralty Church (Amiralitetskyrkan) is a church in Karlskrona. The church is also known as the Ulrica Pia after Ulrike Eleonora. It is located near Vallgatan in the south east of the island Trossö. Inaugurated in 1685, it is made entirely of wood, making it Sweden's largest wooden church. Originally it could seat 4,000. The church is part of the UNESCO World Heritage Site Karlskrona naval base since 1998.