Castelli (Abruzzese: Li Castìllë) is a comune in the province of Teramo, Abruzzo, Italy, included in the Gran Sasso e Monti della Laga National Park.

[3] The medieval hill town lies beneath Mount Camicia on the eastern side of the Gran Sasso Massif.

One of the most valued collections of Castelli ceramics is now housed at the Winter Palace of the Hermitage State Museum in St. Petersburg, Russia.

Castelli's main church is San Donato, which holds a maiolica altar-piece by Francesco Grue (1647) and a medieval silver cross of the Sulmona school.

Its tiled ceiling is believed to have been decorated by the ceramics master Oracio Pompei or artists working from his studio.