* The Chapel of the Holy Shroud (Cappella della Sacra Sindone) in the Cathedral of Turin, one of his most iconic works.
* The Palazzo Carignano in Turin, a masterpiece of Baroque architecture.
* The Church of San Lorenzo in Turin, a significant example of Guarini's architectural style.
* The Church of Santa Maria della Consolata in Turin, a stunning building with a distinctive dome.
* The Palazzo Reale in Turin, where he designed the royal chapel.
Guarini also wrote several theoretical works on architecture and mathematics, including:
* Architettura civile (1686), a treatise on architecture focusing on practical aspects of building construction.
* Placiti filosofici (1686), a collection of philosophical writings.
* Trattato della prospettiva pratica (1739), a treatise on perspective drawing.
While his architectural works are his most famous contribution, his writings offered insightful observations and analyses of his architectural principles.