The historical centre of Allos was fortified in the pastimes and endowed, in the XVII century, of 32 chapels and a number of fountains, with the water supplied by the Chadoulin torrent, an out flowing stream (effluent) of the Allos lake. There are some significant monuments: the chapel of St-Sébastien (XVII century), finely decorated in its interiors, and the church of Notre-Dame de Valvert (XIII century), built in Romanesque style with block of grey limestone. Allos was an important centre for transhumance, and, in the second half of the XX century, it converted itself to the tourism and ski business.