A groin vault is an architectural feature formed by the intersection of two barrel vaults. This creates a curved ceiling that is both strong and visually appealing. Groin vaults are commonly used in large spaces, such as cathedrals and public buildings, allowing for expansive interiors without the need for numerous supporting columns. The design of groin vaults dates back to ancient Roman architecture, where they were used to enhance structural stability and aesthetic beauty. This technique has influenced many styles throughout history, including Gothic and Renaissance architecture, showcasing its enduring significance in building design.