Sant Mateu, capital of the Order of Montesa Historical milestone · Sant Mateu, El Baix Maestrat, Castellón Image of Sant Mateu, not of the place itself. With the military order of Montesa created in 1317 out of the goods of the dissolved Temple, the town became its administrative head in the Maestrazgo; from that capital status come its arcaded square and its Gothic noble houses. 1317 Photo: Columbusalbus (CC BY-SA 3.0) What to see and do in Sant Mateu