Church of the Holy Trinity, the Virgin Mary and Saint Bernard was erected as a Cistercian church in the XIII century. After the the great fire in 1350 it was rebuilt in Gothic forms and has survived largely unchanged to this day. Equipment Gothic church burned down in 1577 and one that can be admired today, was created in the Baroque period. Cathedral nave vaulted basilica is built on a Latin cross plan. Oliwa Cathedral measures 107 meters and is the longest church in Poland. Chair is a wonderful ornament rococo organ from the years 1763-1788. Bodies were made by master Jan Wulf and Frederick Rudolf Dalitz, which in its inception were considered the biggest in Europe.