Masjid Sultan Suriansyah is a historical mosque. Built 300 years ago, this building is the oldest mosque in South Kalimantan. The mosque is located in the North Kuin Village of Banjarmasin. It was built in the reign of Sultan Suriansyah known as Pangeran Samudera. He was the first Banjarnese King who converted into Islam. This mosque was found on the bank of the Kuin River, near Kampung Kraton, which was destroyed by the Dutch colonial. The construction of Masjid Sultan Suriansyah was unique. The roof is layered. It took the Banjar’s past architecture before Islam came. Different from any other old mosques in Banjar, the mihrab has its own roof, separated from the main building. What is mainly discussed in the text?​