The Church of St. Maurus is the most visible church in Izola, as it stands on the top of the medieval island, giving the town its recognizable skyline. The original church, built in 1356, was considerably smaller than the present church, which has been built in 1547 and significantly reconstructed several times in the past centuries. The last modifications were made in the early 20th century, but the original Renaissance design and its later Baroque modifications, as well as other historical elements were preserved. The entirety of the restoration work has been carried out from 1980 to 1982. Its Baroque interior boasts ten altars, a pipe organ, built in 1796 by Gaetano Callido, and wonderful paintings, dating back as far as the 15th century.
The Gothic bell tower standing beside the church was built with Istrian stone in 1585 and is more than 30 meters high. There are 99 steps leading to the top of the tower. Ask in the church to access the best viewing point in Izola. Guided foreign-language tours of the church and its frescoes are organized throughout the summer months.