What does it mean for Hajj to be a pillar of Islam? Share Description Prophet Muhammad pbuh taught us that Islam is built upon 5 pillars with the last of the pillars being Hajj. Ustadh Asim Khan briefly talks about the importance of Hajj in relation to a Muslim's faith. Show more Up next Will Hajj 2020 be cancelled? Recommended What's the significance of the different stations in Hajj? Who is Hajj obligatory upon?