Kuressaare castle is considered one of the best preserved medieval fortifications in Estonia.

The castle is late Gothic in style and characterised by a simplicity of form.
The central, so-called convent building, is a square building around a central courtyard.
The so-called defence tower, in the northern corner, reaches 37 metres (121 ft).
A defence gallery with battlements running along the top of the building was restored in the 1980s.
The portcullis and gate defences are also reconstructions.
Inside, the castle is divided into a cellar which was used for storage and equipped with a sophisticated hypocaust heating system, and the main floor, which housed the most important rooms of the castle.
Here, a cloister surrounds the courtyard and connects all the main rooms.
Notable among these are the refectory, the dormitory, the chapel and the bishop's living quarters.
In the latter, eleven baroque carved epitaphs of noblemen from Saaremaa are displayed.

At the end of the 14th and beginning of the 15th century, a wall, 625 metres (2,051 ft) long, was built around the castle.
Due to improvements made in firearms, additional defensive elements were added between the 16th and 17th centuries.
Erik Dahlbergh designed the Vauban-type fortress with bastions and ravelins that are still largely intact.
When the Russian garrison left the fortress in 1711 following the Great Northern War, they deliberately blew up much of the fortifications and the castle, but later restored some of it.
In 1861, conversion of the bastions into a park began under the supervision of Riga architect H. Göggingen.
Kuressaare castle is considered one of the best preserved medieval fortifications in Estonia.
The castle is late Gothic in style and characterised by a simplicity of form. The central, so-called convent building, is a square building around a central courtyard. The so-called defence tower, in the northern corner, reaches 37 metres (121 ft). A defence gallery with battlements running along the top of the building was restored in the 1980s. The portcullis and gate defences are also reconstructions. Inside, the castle is divided into a cellar which was used for storage and equipped with a sophisticated hypocaust heating system, and the main floor, which housed the most important rooms of the castle. Here, a cloister surrounds the courtyard and connects all the main rooms. Notable among these are the refectory, the dormitory, the chapel and the bishop's living quarters. In the latter, eleven baroque carved epitaphs of noblemen from Saaremaa are displayed.
At the end of the 14th and beginning of the 15th century, a wall, 625 metres (2,051 ft) long, was built around the castle. Due to improvements made in firearms, additional defensive elements were added between the 16th and 17th centuries. Erik Dahlbergh designed the Vauban-type fortress with bastions and ravelins that are still largely intact. When the Russian garrison left the fortress in 1711 following the Great Northern War, they deliberately blew up much of the fortifications and the castle, but later restored some of it. In 1861, conversion of the bastions into a park began under the supervision of Riga architect H. Göggingen.
Kuressaare Castle