Trullo is the term used to describe a stone hut structure having an exterior conical roof with an interior keystone vault that is traditional to Apulia, the southern Italian region that forms the “heel” on the “boot” of Italy. The golden age of trulli (the plural of trullo) occurred in the 19th century, and they were built either as homes by farmhands and farmers or as non-permanent storage facilities and field shelters. Those that have been well preserved, updated, and modernized are often rented out to vacationers looking to experience Old World charm and beauty, but with New World conveniences.