With its first recorded eruption in approximately 1500 B.C., Mt. Etna in Italy is believed to be the oldest active volcano in the world. Mt. Etna has erupted over 190 times and has the most extensive eruption record in history.
Mt. Etna, one of the largest continental volcanoes, last erupted in 1993, its largest eruption as of May 2014.
A volcano in the Pacific Ocean dubbed Tamu Massif, discovered in 2013, is considered the largest volcano in the world. At 120,000 square miles, Tamu Massif is approximately the size of New Mexico. The volcano is estimated to be 145 million years old.