Arie "Aad" Kosto is a retired Dutch politician of the Labour Party (PvdA) and jurist.
Aad Kosto in 1985
Stedelijk Gymnasium Leiden
Stedelijk Gymnasium Leiden is a gymnasium in the Netherlands. Located in Leiden, it is one of the oldest schools in the Netherlands. Its history dates back to the Middle Ages. The Stedelijk Gymnasium Leiden is the biggest gymnasium-only school in the Netherlands, with over 1,800 pupils.
Stedelijk Gymnasium Leiden (Fruinlaan)
School building 1324 (?)-1883 (Lokhorststraat Leiden)
School building 1883-1938 (Doezastraat 2a Leiden)
School building 1938-now (Fruinlaan 15, Leiden)