Nearly all information on Fontana comes from the preface by Fr. Giovanni Battista Reghino to his posthumously published 18 (sometimes incorrectly stated 12)[where?]sonatas (Sonate a 1.2.3. per il violino, o cornetto, fagotto, chitarone, violoncino o simile altro istromento, Venice: Bartolomeo Magni, 1641). They are among the earliest sonatas of this form, consisting of six sonatas for solo violin/cornetto with continuo and 12 sonatas for one to three violins and continuo, the latter group often including a demanding concertante part for bassoon or cello.
"An atto di morte dated 7 September 1630 for a 'Zan Batta Fontana' aged 50, is the only one among the Paduan death registers of 1625–30 for a person bearing that name" (Dunn 2014).
References
Dunn, Thomas D. 2014. "Fontana, Giovanni Battista". Grove Music Online, edited by Deane Root (1 July; accessed 17 July 2017).