Toompea is a hill in Tallinn centre. It is made of limestone and is about 20-30 meters higher than the city around it. It has an area of about 400 by 250 meters.

The first (wooden) castle, Lindanise , is believed to have been built on the hill in either the 10th or 11th century by ancient revalians - ests (estonians). It is probably one of the first inhabitated parts of the Tallinn city. In 1219 the castle was conquered by Danish crusaders - led by Valdemar II. By tradition the Danish flag (a red cow skin with white cross) was given to the Danish king by God when besieging the castle. During the different occupations (Germans, Swedes, Russians) that part of Tallinn has been able to retain its special rights which ended in 1889. Toompea was joined with other parts of Tallinn (lower town) in 1878.

In folklore the city is known as the grave of Kalev.

The Parliament and the Government of Estonia (Stenbock house) are situated there. Other sites include the Pikk Hermann tower.