Little is known about his origins, although he is believed to have come from the area around
Västerås. He is first mentioned in 1539 when he is recorded as being in charge of church-tax collections in Västerås. Between 1540 and 1546 he was
bailiff to the king and the bishop. By 1541 at the latest he became a
canon, by 1543 at the latest a
vicar, and by 1544 at the latest a preacher in Västerås. Between 1545 and 1550 he was schoolmaster in Västerås and from 1546 to 1549
provost in
Tuhundra provostship. Probably in 1550 he became
chaplain to
Gustav Vasa, delivered the funeral sermon for
Margareta Leijonhufvud, and in 1552 handled negotiations with the dissenting bishops in connection with Gustav Vasa's desire to remarry his former wife's niece
Katarina Stenbock. From 1554 he was exempted from tax on his farm Fläka in
Lundby parish, and in 1557 he was appointed
bishop of Västerås
diocese. Swart died in 1562 and was buried on October 5 of the same year in Västerås Cathedral. ==Writings==