Magical Traditions is a sourcebook for Mage: The Awakening. It provides several traditions for Mage players.

Summary
From the Onyx Path catalog:

The Fractured PrismThe higher truths of the Supernal World are constantly broadcast down into the Fallen World, distorted into a thousand different forms — such as the occult beliefs of Sleepers throughout the world. A mage versed in these traditions can see past the Sleeper’s occult trappings to the Supernal truth, like a faint light that is invisible to the blind. Privy to such culture-bound magical secrets, these mages wield power unknown to others.A sourcebook for Mage: The Awakening™

7 magical traditions, from Santeria and Taoist sorcery to the rites of the Knights Templar and Appalachian Hoodoo hexery.
Unique spellcasting rules and benefits for mages versed in a magical tradition
Advice about incorporating magical traditions into chronicles and stories.