Held annually on the eve of Holy Week, the Carnival of Masks and Costumes blends religious tradition with centuries-old cultural influences. According to the National Institute of Anthropology and History, the celebration was introduced to the Americas by Spanish and Portuguese colonizers in the 15th century and has roots in earlier pagan festivities now expressed through music, dance, theatrical performances, colorful costumes and traditional food. While its meaning differs across regions, the carnival broadly marks the start of Lent.