“The God of Wisdom’s enemy is wisdom itself, and the oasis of knowledge is a mirage in the desert of ignorance. In the city of scholars there is a push for folly, yet the God of Wisdom makes no argument against it.” - Dainsleif on Sumeru.
Releasing with Act III: Truth Amongst the Pages of Purana, Sumeru is said to be inspired by both Middle Eastern and Indian culture, being described as both a country of desert and rainforest by official game sources.
Presided over by the God of Wisdom, the Dendro Archon, Sumeru is considered to be the central place of scholastic learning and knowledge. Lisa studied magic at the Sumeru Arcademia though later returned to Mondstadt after becoming disenfranchised by scholarly life. Paimon also mentions that people from Sumeru are known for their ability to read the stars and that this is rare outside of Sumeru.