In 1845, by the new Constitution and the so-called "Pidal's law", the network of "National" primary and secondary schools is established in Spain, managed by the central government through the Department (later Ministry) of National Education. Hence, the old Imperial College became the Instituto San Isidro, a status that, with few changes, continues today. In 1999, as part of the decentralization process started with the Spanish Constitution of 1978, the property and management of the Instituto San Isidro was transferred to the Government of the Community of Madrid.