Vyborg Old Cathedral is the oldest building in Vyborg, but today only some parts of its walls and the tower remain. The parish of Vyborg was established during the third crusade around the year 1293. There were several wooden churches the last one was destroyed by Novgorodians in 1411.
The construction of stone-made cathedral was began in 1430s and in was completed around 1445. The medieval appearance is unknown, because parts of the cathedral have been changed and demolished several times. The original nave was probably about 37m long and 20m wide. In addition to the main altar there were also few side altars. Unfortunately the interior is completely disappeared or destroyed in wars and reconstructions.
Some notable persons has been buried to the church like nobleman Erik Axelsson Tott and probably Mikael Agricola, the founder of written Finish language.
During the centuries the Vyborg cathedral was first Catholic, then Lutheran and during the Russian order also an Orthodox church. Peter the Great ordered to renovate it for Orthodox worships in 1720. In 1805 it was remodified as a magazine. In 1913 the cathedral was again restored and after the Independence of Finland it was moved once again Lutheran church. In the Winter War (1940) the aerial bomb hit the church and only walls survived.
The Church of St Eustace was built between 1532-1632. St Eustace"s is considered a masterpiece of late Gothic architecture. The church’s reputation was strong enough of the time for it to be chosen as the location for a young Louis XIV to receive communion. Mozart also chose the sanctuary as the location for his mother’s funeral. Among those baptised here as children were Richelieu, Jeanne-Antoinette Poisson, future Madame de Pompadour and Molière, who was also married here in the 17th century. The last rites for Anne of Austria, Turenne and Mirabeau were pronounced within its walls. Marie de Gournay is buried there.
The origins of Saint Eustache date back to 13th century. The church became a parish church in 1223, thanks to a man named Jean Alais who achieved this by taxing the baskets of fish sold nearby, as granted by King Philip Augustus. To thank such divine generosity, Alais constructed a chapel dedicated to Sainte-Agnès, a Roman martyr.