He is considered one of the leading representatives of late French Baroque.

Leopoldo's brothers were Donato Riccardo, Livio, and Paolo Retti.

[1] While his brothers worked at the palace, Leopoldo traveled to Paris and received an architectural education.

In 1726, Eberhard Louis, Duke of Württemberg, charged Retti with the continued construction of Ludwigsburg and has given the honorary rank Leutnant and an annual salary of 400 guilders.

The next year, Carl Friedrich von Zocha resigned and Retti replaced him as court architect of the Principality of Ansbach.