
One of the earliest mosques in Islamic history outside the Hejaz, founded around the 6th year of the Hijra (627 to 628 CE) during the lifetime of the Prophet Muhammad in the garden of the ancient Sabaean-Himyarite Ghumdan Palace, expanded under Caliph Al-Walid I and Queen Arwa al-Sulayhi, and site of the 1972 discovery of the seventh-century Sana'a Qur'an manuscripts.
Photo: Ayah Alakwaa, CC BY-SA 4.0, Wikimedia Commons