King Ottokar II founded Marchegg prior to 1268 by building an imposing fortification complex. The castle was originally part of this complex but dons a Baroque guise today following numerous modifications and additions.
It has been owned by the municipality of Marchegg since 1954. Nowadays, it is a centerpiece of tourist activities and the gateway to the adjoining March wetlands nature preserve, home to one of the largest colonies of tree-breeding white storks in Central Europe.
The Marchfeld region with Marchegg as its main town has been named a venue for the Lower Austrian Exhibition of 2022.