More than 1,000 people have gathered in the city of Chiang Mai in Thailand, protesting a luxury building development in a forested area.

Considered one of the country’s biggest demonstrations protests, the group rallied against a proposed housing development for judges and officials in the foothills of a sacred mountain.

The mountain accommodates a religious temple, and is considered sacred to many of the locals. 

Authorities have defended the building, having already spent $32 million on the project.