Work on the temple, which is dedicated to the Holy Trinity, began on 11 July 1819[1] and resumed after Canova's death in 1822 until 1830 under the supervision of abbot Giovanni Battista Sartori and architect Giuseppe Segusini.
The project underwent several modifications by Pietro Bosio and Giovanni Zardo along with Giannantonio Selva and Luigi Rossini.
Canova almost single-handedly financed the site since he wished to be buried there after his request of a burial at the Rome Pantheon was denied.
The architrave bears the Latin inscription: DEO OPT MAX UNI AC TRINO (Temple dedicated to the Optimal God, one and three).
The altars contain canvases from shuttered churches and monasteries including by Luca Giordano (St Francis of Paola); Palma il Giovane (Jesus in Gesthemane); Giovanni de Sacchis called il Pordenone (Madonna of the Mercies); and Andrea Vicentino (Saints Sebastian; Francis of Assisi, Roch, Anthony with the Madonna and child and a glory of angels).