From 1772 to 1778 he reconstructed and enlarged the interior of the church of the Monte Oliveto Maggiore abbey not far from Siena, creating grandiose Baroque shapes which anticipated the neoclassical forms to come.
He built them the structures sustaining temporary wooden hall in the courtyard of their palazzo in Via del Corso in 1769 in occasion of the visit of emperor Joseph II of Austria.
On the accession of Pope Pius VI, Antinori was put in charge of an important excavation in the church of San Rocco, near the Mausoleum of Augustus, which revealed a large red obelisk of granite.
He also worked on the Piazza del Quirinale, rotating the Horse Tamers statues (originally parallel to each other) and placing the obelisk from S. Rocco between them using powerful winches and mechanisms.
In 1929 that church was demolished to make way for gardens and public spaces around the Vittorio Emmanuele Monument and, despite requests from the local government of Camerino, it proved impossible to find and save Antinori's mortal remains before demolition.