Larochette (Luxembourgish: Fiels, German: Fels) is a commune and town in central Luxembourg, in the canton of Mersch. It is situated on the White Ernz river. The town is dominated by the partly ruined Larochette Castle. As of 2005, the town of Larochette, which lies in the north-east of the commune, has a population of 1,359. Other towns within the commune include Ernzen. Meysembourg Castle, located some 2 kilometres (1 1⁄4 mi) south-west of Larochette, has a history dating back to the 12th century. Today's castle was built in 1880 in Neo-Renaissance style and is privately owned.