Giovanni Battista or Giambattista Martini, O.F.M. Conv. (24 April 1706 – 3 August 1784), also known as Padre Martini, was an Italian Conventual Franciscan friar, who was a leading musician and composer of the period.
Giovanni Battista Martini was born in Bologna, in that era part of the Papal States. His father, Antonio Maria Martini, a violinist, taught him the elements of music and the violin and later learned singing and harpsichord playing from Padre Pradieri, and counterpoint from Antonio Riccieri and Giacomo Antonio Perti. Having received his education in classics from the priests of the Oratory of Saint Philip Neri, he afterwards entered the novitiate of the Conventual Franciscans at their friary in Lago, at the close of which he professed religious vows and received the religious habit of the Order on 11 September 1722.
In 1725, though only 19 years old, he received the appointment of chapel-master at the Basilica of San Francesco in Bologna, where his compositions attracted attention. At the invitation of amateurs and professional friends he opened a school of composition at which several celebrated musicians were trained; as a teacher he consistently declared his preference for the traditions of the old Roman school of composition. Martini was a zealous collector of musical literature, and possessed an extensive musical library. Burney estimated it at 17,000 volumes; after Martini's death a portion of it passed to the Imperial library at Vienna, the rest remaining in Bologna, now in the Museo Internazionale della Musica (ex Civico Museo Bibliografico Musicale).