What does Gustavino refer to?

Gustavino refers specifically to the technique of timbrel roof vaulting that utilizes lighter terra cotta tiles. This architectural method was developed by the Spanish architect Rafael Gustavino, and it is known for its distinctive curved shapes and durability. The use of terra cotta tiles provided a lightweight solution while still achieving the strength necessary for large vaulted spaces, which made it popular in the construction of various notable structures in New York City, such as Grand Central Terminal and the Metropolitan Museum of Art. This technique exemplifies an innovative approach to architecture and has become an integral part of the city's architectural heritage.