The Senate Square (in Finnish Senaatintori , in Swedish Senatstorget ) presents Carl Ludvig Engel 's architecture as a unique allegory of political, religious, scientific and commercial powers in the centre of Helsinki .

The Palace of the Council of State was completed on the eastern side of the Senate Square in 1822. It served as the Senate of Finland and now houses the offices of the Prime minister of Finland and the cabinet . until 1907 when the Eduskunta building was completed. The main University building, on the opposite side of the Senate Square, was constructed in 1832. The Helsinki Cathedral on the northern edge of the Senate Square, was Engel's lengthiest architectural project. He was working on it from 1818 until his death in 1840. The Helsinki Cathedral - then called the Church of Nicholas - dominates the Senate Square, and was finalized twelve years afters Engel's death, in 1852.

Today, the Senate Square is one of the main tourist attractions of Helsinki. Various art happenings, ranging from concerts to snow buildings to controversial snow board happenings, have been set up on the Senate Square.