Antonio Lotti (5 January 1667 – 5 January 1740) was an Italian Baroque composer.
Lotti was born in Venice, although his father Matteo was Kapellmeister at Hanover at the time. In 1682, Lotti began studying with Lodovico Fuga and Giovanni Legrenzi, both of whom were employed at St Mark's Basilica, Venice's principal church. Lotti made his career at St Mark's, first as an alto singer (from 1689), then as assistant to the second organist, then as second organist (from 1692), then (from 1704) as first organist, and finally (from 1736) as maestro di cappella, a position he held until his death. He also wrote music for, and taught at, the Ospedale degli Incurabili. In 1717 he was given leave to go to Dresden, where a number of his operas were produced, including Giove in Argo, Teofane and Li quattro elementi (all with librettos by Antonio Maria Luchini). Other works written in Venice include Giustino; Trionfo dell'Innocenza; the first act of Tirsi, Achille Placato, Teuzzone, Ama più che non si crede, Il comando inteso e tradito, Sidonio, Isaccio tiranno, La forze de sangue, Il Tradimento traditore di sè stesso, L'Infedeltà punita, Poresenna, Irene Augusta, Polidoro, Foca superbo, Alessandro Severo, Il Vincitore Generossi. In Dresden, he wrote Odii del Sangue delusi. He returned to Venice in 1719 and remained there until his death in 1740.
Lotti wrote in a variety of forms, producing masses, cantatas, madrigals, around thirty operas, and instrumental music. His sacred choral works are often unaccompanied (a cappella). His work is considered a bridge between the established Baroque and emerging Classical styles. Lotti is thought to have influenced Johann Sebastian Bach, George Frideric Handel, and Johann Dismas Zelenka, all of whom had copies of Lotti's mass, the Missa Sapientiae.
Lotti was a notable teacher, with Domenico Alberti, Benedetto Marcello, Giovanni Battista Pescetti, Baldassare Galuppi, Giuseppe Saratelli and Johann Dismas Zelenka among his pupils. He was married to the noted soprano Santa Stella.