St. Louis School operates across three modern campuses in Milan, each designed to deliver a world-class international education through outstanding facilities, innovative teaching environments and a strong focus on academic excellence.

The Via Caviglia Campus offers a modern, purpose-built learning environment for students aged 2–14. Facilities include bright, contemporary classrooms, dedicated Early Years spaces, fully equipped science laboratories, a library for independent learning, and indoor and outdoor sports areas. The campus supports the British and Italian curricula through a safe, nurturing and academically focused setting designed to build strong foundations for future success.

The Via Colonna Campus provides a spacious and welcoming international school environment for students aged 2–14. Key facilities include modern classrooms, dedicated sports facilities, dining areas, and age-appropriate learning spaces that support academic, social and emotional development. The campus promotes bilingual learning, student wellbeing and academic progress within a structured British curriculum framework.

Located in the heart of Milan within the historic Palazzo Archinto, the Archinto Campus is the school’s flagship High School for students aged 14–18. The campus features specialist science and computer laboratories, modern classrooms, advanced learning spaces, and dedicated areas for IGCSE and IB Diploma study. Combining historic architecture with state-of-the-art facilities, Archinto provides a prestigious academic environment designed for university preparation and outstanding IB performance.