Rerum

Rerum may refer to :


 * Lacrimae rerum is the Latin for tears for things.
 * Rerum novarum is an encyclical issued by Pope Leo XIII on May 16, 1891.
 * Rerum Moscoviticarum Commentarii was a Latin book by Baron Sigismund von Herberstein on the geography, history and customs of Muscovy.
 * Rerum Deus Tenax Vigor is the daily hymn for None in the Roman Catholic Breviary.
 * Silva rerum was a specific type of a book, a multi-generational chronicle.