An ancient Christian monastery possibly dating as far back as the years before Islam spread across the Arabian Peninsula has been discovered on an island off the coast of the United Arab Emirates, officials announced Thursday.

The monastery on Siniyah Island, part of the sand-dune sheikhdom of Umm al-Quwain, sheds new light on the history of early Christianity along the shores of the Persian Gulf. It marks the second such monastery found in the Emirates, dating back as many as 1,400 years — long before its desert expanses gave birth to a thriving oil industry that led to a unified nation home to the high-rise towers of Abu Dhabi and Dubai.

The two monasteries became lost to history in the sands of time as scholars believe Christians slowly converted to Islam as that faith grew more prevalent in the region.

Today, Christians remain a minority across the wider Middle East, though Pope Francis arrived in nearby Bahrain on Thursday to promote interfaith dialogue with Muslim leaders.

For Timothy Power, an associate professor of archaeology at the United Arab Emirates University who helped investigate the newly discovered monastery, the UAE today is a “melting pot of nations.”

AP