Vanaja Church

The Church of the Holy Cross, first mentioned in 1324, is the oldest church in the historical province of Tavastia. The present brick church is believed to have been completed at the end of the 15th century. The Church of the Holy Cross in Hattula and the Church of St. Lawrence in Lohja are the most important pictorial churches in Finland, and they are considered sister churches because of the richness of their paintings.

St. Laurus Church in Janakkala is a medieval sandstone church, probably consecrated in 1520. A wooden church would have already been present on the site in the 13th century. The sacristy and armoury of the church were demolished in the 19th century when it was transformed into an Empire-style cruciform church and a new sacristy was built at the eastern end. The bell tower was built by the church builder Martti Tolpo and was completed in 1785. The church bells date from the 17th and 18th centuries.

The church of Renko is a medieval stone church built in the late 15th or early 16th century. The octagonal church was abandoned in the 17th century. Very little remains of the medieval church, because in 1783 the stone ruin was demolished, except for the foundations, and rebuilt from it.