Rafael Guastavino Moreno (Spanish pronunciation: [rafa'el ?wasta'รino]; March 1, 1842 โ February 1, 1908) was a Spanish building engineer and builder who immigrated to the United States in 1881; his career for the next three decades was based in New York City.Based on the Catalan vault, he created the Guastavino tile, a "Tile Arch System", patented in the United States in 1885, which was used for constructing robust, self-supporting arches and architectural vaults using interlocking terracotta tiles and layers of mortar.
His work appears in numerous prominent projects designed by major architectural firms in New York and other cities of the Northeast.
Guastavino tile is found in some of New York's most prominent Beaux-Arts landmarks and in major buildings across the United States.
It is also used in numerous architecturally important and famous buildings with vaulted spaces.