Tallinn - Oleviste kirik

Tallinn, the capital city of Estonia, is situated on the shore of the Gulf of Finland of the Baltic Sea. It is only 80 kilometres south of Helsinki. From the 13th century until the first half of the 20th century Tallinn was known as Reval.

The first recorded claim over the place was laid by Denmark after a raid in 1219 led by Valdemar II. In 1227, the Order of the Brothers of the Sword conquered Reval and three years later recruited 200 Westphalian and Lower Saxon merchants from Gotland, who settled below the castle and were granted freedom of customs and land. In 1238 Reval fell back to Denmark, Under renewed Danish rule, the city rapidly grew in size and economic importance. In 1248, the Danish king granted it the Lübische Stadtrecht (town charter). Due to the strategic location, its port became a significant trade hub, especially in the 14–16th centuries when Tallinn grew in importance as the northernmost member city of the Hanseatic League.

The king of Denmark sold Reval along with other land possessions in northern Estonia to the Teutonic Knights in 1346.

The first Olaikirche was probably built in the 12th century. It was dedicated to Saint Olaf (also known as the Norwegian King Olav II Haraldsson) and was the centre of a Scandinavian community before Denmark conquered Tallinn in 1219. The first known written records of the church date from 1267. The church was extensively rebuilt in the 14th century.

In 1590, the height of the church tower was about 125 m and was a landmark for sailors (Saint Olaf was their patron saint). The tower was struck by lightning about 10 times, and the entire church burned down three times. After several rebuilds, the spire is now 123.8 metres high.