Santi Pietro e Paolo, Neoclassical church building in Oleggio, Italy.

Santi Pietro e Paolo is a church in Oleggio with three naves and nine altars set into the walls, plus three side oratories of the confraternities of SS. Fabiano and Sebastiano, the Rosario and the Corpus Domini. It has no bell tower; six bells in E-flat hang above the choir loft. It is one of the examples of Antonelli's architecture in the Novara area.

Alessandro Antonelli designed and completed this church in 1858 during a period when northern Italy experienced significant religious construction. The project demonstrated architectural ideas he would later develop in his other major works.

The church has three naves with nine altars set into the walls, plus three oratories used by the confraternities of Saints Fabian and Sebastian, of the Rosary and of Corpus Domini. The oratory of Saints Fabian and Sebastian stands above the sacristy, the other two on the opposite side.

The church stands in Oleggio's historic centre, in the province and diocese of Novara, and is part of the Oleggio pastoral unit. It has no bell tower: the civic tower in Piazza is often mistaken for one, while six bells hang above the choir loft. Look for the bells' inscriptions, which record founders and dates from 1858 to 2000.

The church has no bell tower: the so-called Campanile di Piazza in Oleggio is actually a civic tower. Six bells hang above the choir loft instead, in E-flat 3, from different foundries: the two largest, with ultralight profiles, were cast by Fratelli Barigozzi of Oleggio in 1858, the third by Roberto Mazzola of Valduggia in 1954, the fourth and fifth by Roberto Mazzola in 1940, and the sixth by Allanconi of Bolzone di Ripalta Cremasca in 2000.