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Mecca - Wikipedia
Mecca | History, Pilgrimage, Population, Map, & Facts
Mecca – Travel guide at Wikivoyage
Kaaba | Definition, Interior, Black Stone, & Fact | Britannica
Kaaba - Wikipedia
Smarthistory – The Kaaba
Mecca - Sacred Sites: World Pilgrimage Guide
Makkah - Visit Saudi Official Website
BBC - Religions - Islam: Hajj: pilgrimage to Mecca
Mecca summary | Britannica