The Church of the Holy Ghost or Church of the Holy Spirit is a medieval Lutheran church in the old town district of Tallinn, Estonia.The church has a plain, white-washed exterior with crow-stepped gables, an octagonal tower with the above-mentioned reconstructed renaissance spire and few but rather large Gothic windows with fine stone dressing. The stained glass windows are late 20th century. Most noteworthy in the exterior is the finely carved clock, a work by Christian Ackermann (late 17th century). The layout of the interior is somewhat unusual, with the choir located asymmetrically to the north and a two-aisled nave. Of the interior decoration, especially the remarkable main altar, a work by Bernt Notke, is noteworthy. It dates from 1483 and depicts, on the central panel, the descent of the Holy Ghost on the twelve apostles at Pentecost. The galleries in the church are richly decorated with scenes from the Bible, painted in the mid-17th century and probably by different artists. Of more recent origin is the organ, dating from 1929, and a commemorative plaque next to the altar, put up in memory of British sailors who lost their lives during the British campaign in the Baltic (1918–1919).