St.Peter's congregation of Tartu was established on 27 October 1869 and the St. Peter's Church was consecrated in 1884. This pseudogothic imposing building was built pursuant to a design by E. Schröder. The location was symbolic of the time of the Estonian awakening: in the proximity of the square where the first general Estonian song festival took place. The church was finally completed in 1903, when the freshly finished 55- metre chief tower and four corner towers were consecrated. A 22- register organ and the altar painting, "Dying Christ" (by J. Köler), were finished in the 1890's. Both church bells have been cast in Gatsina near St. Petersburg.
Reference: Visit Tartu
First record of Kastelholma (or Kastelholm) castle is from the year 1388 in the contract of Queen Margaret I of Denmark, where a large portion of the inheritance of Bo Jonsson Grip was given to the queen. The heyday of the castle was in the 15th and 16th centuries when it was administrated by Danish and Swedish kings and stewards of the realms. Kastelhoma was expanded and enhanced several times.
In the end of 16th century castle was owned by the previous queen Catherine Jagellon (Stenbock), an enemy of the King of Sweden Eric XIV. King Eric conquered Kastelholma in 1599 and all defending officers were taken to Turku and executed. The castle was damaged under the siege and it took 30 years to renovate it.
In 1634 Åland was joined with the County of Åbo and Björneborg and Kastelholma lost its administrative status.