Medieval castle · Saare County · Maasi
Maasilinn Soneburg
After the islanders destroyed the Order castle at Pöide in the 1343 uprising, Maasilinn became the new seat of the Order’s bailiff on Saaremaa. At its heart stood a three-story main building 47 meters long with walls up to 3 meters thick, ringed by a curtain wall with half-round cannon towers. It changed hands several times in the Livonian War, and in 1576 King Frederick II of Denmark had it blown up.
See it in the 3D flight
Built / first recorded 1300s–1500s
Style Gothic Order castle
Condition Lost 1576
German name Soneburg
Today
Excavated and restored since 2001, the ruins host performances and events.
Owners
Good to know The main building measures 46.9 by 12.2 m, with walls 2.1–3 m thick. Its older part held a hooded fireplace and a hypocaust heating stove. The Silurian Maasi rock beds are named after the castle.
Photos through time archive · The Maasilinn castle ruins Vello Mäss · Eesti Meremuuseum, MM F 4520 · ©archive · Maasilinn: a pillar Tõnu Grepp · Saaremaa Muuseum, SM F 3829:568 F · ©archive · Maasilinn Rein Kärner · Saaremaa Muuseum, SM F 4229:202 Fn · ©archive · The west end of the main building from the south Vassiljev · Saaremaa Muuseum, SM _ 2028:1 F · ©archive · The ruins from the south Vassiljev · Saaremaa Muuseum, SM _ 2028:2 F · ©archive · The seaward side of the main building Vassiljev · Saaremaa Muuseum, SM _ 2028:4 F · ©archive · The south side during excavations Vassiljev · Saaremaa Muuseum, SM _ 2028:6 F · ©archive · The southeast corner of the outer wall Vassiljev · Saaremaa Muuseum, SM _ 2028:10 F · ©2007 · Maasi castle, 2007 HendrixEesti · Public domain2012 · Maasilinn, 2012 Ivo Kruusamägi · CC BY-SA 3.0 EE2012 · The castle’s ground floor, 2012 Ivo Kruusamägi · CC BY-SA 3.0 EE
Nearby
The buildings are stylized impressions, not surveyed models. Facts: mois.ee, Museum of Estonian Architecture, ERR, Wikipedia. Photos: MuIS and Wikimedia Commons, credited with each photo.
© 2026 Valev Laube · A mini-project by Valev Laube · valevlaube.com/lab