The first buildings on the site of San Martino were a religious institution, the hospice of saints Martino and Giuliano, which welcomed travelers crossing the Alps by the
Rolle Pass between the valleys of
Primiero and
Fiemme. All that remains of the hospice is the church of San Martino, which has a romanesque bell-tower. The first alpine hotel in San Martino was built by the Irish traveller,
John Ball in 1873. By the 1900s, San Martino di Castrozza was already established as a tourist destination for the wealthy of the Austro-Hungarian Empire, of which Trentino then formed part. The resort was rebuilt after the devastation of the First World War, and grew rapidly thereafter. ==Geography==