The Thailand Province of the Society of Jesus is located in Bangkok, Thailand. The Jesuits have been present in Thailand since approximately 1607, when Fr. Baltasar Sequeira arrived in the city of Siam. Today the Jesuits residing in this province work in the cities of Bangkok, Bangsaen, Chiang Mai, and Samphran. Their work includes running parishes, operating spirituality centers, and working with students as well as prisoners.