In times of the First Spanish Republic (1873–1874), the federal republicans conceived the project to create a federated state of eleven provinces in the valley of the Spanish Douro, that would also have included the provinces of Santander and Logroño. Very few years before, in 1869, as part of a manifesto, federal republicans representatives of the 17 provinces of Albacete, Ávila, Burgos, Ciudad Real, Cuenca, Guadalajara, León, Logroño, Madrid, Palencia, Salamanca, Santander, Segovia, Soria, Toledo, Valladolid and Zamora proposed in the so-called Castilian Federal Pact the conformation of an entity formed by two different "states": the state of Old Castile -that is presently built for the current Castilian-Leonese provinces and the provinces of Logroño and Santander-, and the state of New Castile -which conforms to the current provinces of Castile-La Mancha plus the province of Madrid-. The end of the Republic, at the beginning of 1874, thwarted the initiative. thumb|right|Manifestation of 1978 in Valladolid that sued a Statute of Autonomy for the region.
in times of the first spanish republic (1873–1874) the federal republicans conceived the project to create a federated state of eleven provinces in the valley of the spanish douro that would also have included the provinces of santander and logroño very few years before in 1869 as part of a manifesto federal republicans representatives of the 17 provinces of albacete ávila burgos ciudad real cuenca guadalajara león logroño madrid palencia salamanca santander segovia soria toledo valladolid and zamora proposed in the so-called castilian federal pact the conformation of an entity formed by two different "states" the state of old castile -that is presently built for the current castilian-leonese provinces and the provinces of logroño and santander- and the state of new castile -which conforms to the current provinces of castile-la mancha plus the province of madrid- the end of the republic at the beginning of 1874 thwarted the initiative thumb|right|manifestation of 1978 in valladolid that sued a statute of autonomy for the region