Sillar is a type of volcanic stone commonly found in the region of Arequipa, Peru. It is known for its light weight and pale color, which can range from white to light gray. This material is often used in construction, particularly for building facades and decorative elements, due to its aesthetic appeal and thermal properties. The use of sillar dates back to the colonial period, when it became a popular choice for constructing churches and homes in Arequipa. The stone is typically carved and shaped by hand, showcasing the craftsmanship of local artisans. Today, sillar remains an important part of the architectural heritage of the region.