The World Record of ‘largest mosque’ has been achieved by Masjid al-Haram from Mecca, Saudi Arabia.

Masjid al-Haram is the largest mosque in the world. The mosque is also known as the Grand Mosque. The structure covers an area of 4,008,020 square metres (990.40 acres) including the outdoor and indoor praying spaces and can accommodate up to four million Muslim worshippers during the Hajj period.