The Duke of York is expected to spend two days at the college campus and will inaugurate the conference on Sunday morning.
The Round Square is an international association of about 70 schools spread over five continents. The gathering at Mayo is the annual conference of this association.
Besides Mayo College, other schools from India participating in the conference include Doon School in Dehradun, Daly College in Indore and the Sindhia School in Gwalior.
Prince Andrew is the Patron of the Round Square group of schools. He will fly back to London on Sunday evening.