Siror was a comune in Trentino in the northern Italian region Trentino-Alto Adige/Südtirol, located about 60 kilometres east of Trento. As of 31 December 2004, it had a population of 1,244 and an area of 75.1 square kilometres. It was merged with Fiera di Primiero, Tonadico and Transacqua on January 1, 2016, to form a new municipality, Primiero San Martino di Castrozza.The municipality of Siror contains the frazioni Nolesca and part of San Martino di Castrozza.
Siror borders the following municipalities: Canale d'Agordo, Predazzo, Canal San Bovo, Mezzano, Imer, Tonadico and Transacqua.
Wikipedia https://en.wikipedia.org/wiki/Siror
Coordinates 46°11'19.193" N 11°49'50.759" E