Obama grandmother
Sara Omar, Barack Obama's grandmother, visited Mecca.Twitter

US President Barack Obama's paternal grandmother Sara Omar was in Saudi Arabia this week to visit the holy city of Mecca for Umrah, a sacred pilgrimage in Islam.

The 94-year-old, visited the kingdom with her son and grandson, and attended an exhibition on the life of Prophet Muhammad. 

She reportedly said the Saudi exhibition reflected "moderate teachings of Islam". 

"I am very happy to visit this exhibition, which is a good example for the propagation of Islam in a modern way, supported by scientific and authentic documents," she said, according to Arab News

While Omar's visit was not an unusual one, it sparked some discussion on Twitter, especially around Obama's religion, which has been speculated under conspiracy theories in the past.

Obama is a Christian, and his late father, a Kenyan, was a Muslim