The word basilica is derived from a Greek term meaning “royal house.” In the Catholic world, a basilica is a church building that has been accorded special privileges by the pope.

The term "basilica" is derived from the Greek word basilikē, which translates to "royal" or "kingly" (from basileus, meaning king). In the Roman Empire, a basilica was a large, roofed hall used as a public court of law or a center for business and administration—essentially a "royal hall" for civic life. When Christianity was legalized, the architectural style of the Roman basilica (a long central nave with side aisles) was adopted for churches to accommodate large congregations. In 2026, the term has two meanings: an architectural style and a canonical status. In the Catholic Church, the Pope grants the title of "Basilica" to specific churches based on their antiquity, historical importance, or architectural beauty. These churches are granted special privileges and symbols, such as the ombrellino (a red and gold umbrella) and the tintinnabulum (a small bell), which signify their close bond with the Papacy and their status as a "royal" house of worship within the global faith.