Sitting in the shade of a large boulder, with his arms wrapped around his knees and his head lowered, Belacqua epitomizes the lazy spirits who waited until the last minute before repenting and turning to God. These souls must now wait in Ante-Purgatory for as long as they negligently delayed their repentance on earth: that is, the length of their mortal lives. Aware of this rule, Belacqua, true to character, is in no rush to begin the arduous climb up the mountain.
Belacqua is most likely the nickname of Duccio di Bonavia, a Florentine musician and instrument maker with whom Dante appears to have had a warm friendship characterized by comical, witty teasing. Since Belacqua was still alive in 1299, it’s plausible that he died shortly before Dante’s arrival in Purgatory in 1300. One early commentator, calling Belacqua the laziest man who ever lived, repeats the gossip that from the moment Belacqua arrived in his shop in the morning and sat down, he never got up except to eat and sleep.
From Dante World at UT-Austin