Built in the 14th century with timber interior and a hexagonal tower, the bright white Church of the Holy Spirit is one of the oldest and finest structures in Tallinn. Before entering the church, take a look at the façade with a clock that has been measuring time since the 17th century. The treasures inside include a unique altar created by Berndt Notke in the 15th century and the pulpit built in 1597.

In medieval times, it was the main sanctuary for commoners. After the Reformation, the first Estonian sermons instead of German ones were held here, and Johann Koell's Catechism, written by the pastor of the church and published in 1535, is considered the first book in Estonian.