Like other builders and stucco-workers in his family, including his generation and the next, Carlone built in the so-called "Jesuit style".
However, the Carlones in Austria followed the spread in northern Italy of the pilaster style of church with galleries, barrel vault, straight chancel without transept and twin-tower facade.
[1] The first buildings associated with the name of Pietro Francesco Carlone are the chapel dedicated to St. Sebastian in Frohnleiten in 1625, and a bathhouse created in 1631 for the Congregation of the Jesuits in Leoben.
The builder incorporated existing structures in the work, which was purely functional and largely dispensed with artistic design.
Carlone was commissioned in 1650 with construction of the huge "Upper Convent" in the northwest of the church of the Benedictine Göss Abbey in Leoben.
Carlone converted Saint George's Abbey, Längsee, into Baroque style in the years 1654–1658, with the exception of the tower, which was built in 1676.
In 1658, Pietro Francesco Carlone built the choir and side chapels of the parish church of St. Magdalena in Tragöß-Oberort in Bruck an der Mur.
The Imperial Hall, completed in the year 1640, was decorated with rich stucco work in 1660 in preparation for a visit of the Emperor Leopold I.
[1] Designed and finished by his sons Carlo Antonio and Giovanni Battista, it was said to have one of the most magnificent interiors of the late Austro-Italian Baroque.
)[1] Other members of the Carlone family, Giovanni Battista or Bartolomeo, created the stucco and frescoes in 1684–85.