Mantsopa was a sister to King Moshoeshoe who banished her from the Kingdom when he suspected that her powers were greater than his. When she arrived at Modderpoort there were no houses and she stayed in a cave. In 1886 a group of men called The Brotherhood of St Augustine arrived at Modderpoort, and Mantsopa accommodated them in her cave. The missionaries decided to stay and they turned the cave into a chapel. Mantsopa later joined the church and was baptised and given the name Anna. Mantsopa's grave continues to be visited and offerings are still placed on or near it.