Ministry of Inquisition was one of the Ministries of the Covenant. It may have been charged with trying and convicting heretics within the Covenant. The fact that a human, from an entire species deemed heretical by the Prophets, was brought before its Minister may indicate that the Ministry of Inquisition also plays an important role in the war on humanity. The Minister of Inquisition was present in 2552, during the Battle of Earth.