The Osun-Osogbo festival runs for two weeks in August and culminates in the procession of the Arugba, a young virgin of the royal lineage who carries the covered calabash of sacrificial materials on her head from the palace to the river through an enormous crowd, in silence, and may not be touched — the crowd parts and people pray as she passes. Attendance runs into the hundreds of thousands and includes devotees from Cuba, Brazil, Trinidad and the United States, alongside very large numbers of Nigerian Christians and Muslims who describe their presence as cultural. The sacred grove, some seventy-five hectares of forest on the river with shrines and monumental sculptures, was inscribed as a UNESCO World Heritage Site in 2005. Its survival is substantially owed to Susanne Wenger, the Austrian artist who arrived in the 1950s, was initiated, took the name Adunni Olorisha, and spent half a century restoring shrines and resisting logging and development.