The oldest known reference to Losser dates from the tenth century. Originally, the village consisted of two separate parts. Both were almost completely destroyed when on 21 September 1665, troops from
Münster set fire to them. One of the town's oldest buildings is the Martinustoren (St. Martin's Tower), dating from around 1500 and the only remaining part of a church demolished in 1903. The district of Glane is home to the Mor Ephrem Monastery, the only
Syriac Orthodox monastery in Europe. Originally founded in 1911 as the St Olaf monastery by Norwegian
Sisters of Saint Joseph of Chambery, it was converted into Syriac Orthodox monastery on 7 July 1984 and is the official diocesan headquarters of the Syriac Orthodox Diocese of the Netherlands. ==Geography==