The Persian Mastiff is a large and powerful dog breed that is native to Iran (formerly Persia). It is also known as the Iranian Mastiff, Persian Lion Dog or Sarabi Dog. It is a muscular and heavy-boned dog with a thick, double-coat that comes in various colors, including black, fawn, and brindle. They were originally bred to guard livestock and protect homes, and are fearless and alert watchdogs. The Persian Mastiff is also known for its loyalty and affection towards its family.