The first historical reference to the former Saint Mary church dates back to the first millennium. Valère castle lies on the southern hill, while Tourbillon is situated on the northern one. The two of them block the entire valley of the Rhône.

A primeira referência histórica à antiga igreja de Santa Maria remonta ao primeiro milénio. O castelo de Valère fica na colina sul, enquanto o Tourbillon está situado na colina norte. Os dois bloqueiam todo o vale do Ródano.

https://www.swissminiatur.ch/73-valere-and-tourbillon-castles-sion-vs/?lang=en