[1] Located in Montagnola, Collina D'Oro near Lugano, in the Canton of Ticino, the school enrolls approximately 700 pupils from around the world.

[9] For the first few years the school was operating, it was located in Locarno, then in Lugano-Loreto until the purchase of the 17th-century Villa de Nobili in Montagnola in 1960.

Since its establishment, TASIS has expanded to include schools and summer programs in England, Greece, Cyprus, Italy, France, Spain, and Puerto Rico.

Illarietti described the scene "after the bell" as security officers escort students to "a parade of mothers" who pick them up in "Mercedes, Bentley's and Ferraris," as looking "like a big time gala,' "[19] In 2021, Radio Free Europe reported that Leonid Slutsky, a member of Russia's Duma who was sanctioned by the US, had enrolled his daughter at TASIS.

[20] The school has been separately listed by outlets The Independent and SCMP as one of the most expensive both in Switzerland and the world based on its boarding fees.