The county of Durango was a vassal state of the Kingdom of Pamplona (later, Navarre), and in the 13th century it became a constituent part of the Lordship of Biscay.

It appears again in the record of a committee that took place in the church of San Agustin-Etxebarria in the year 1053, this time with the name Duranko.

In the year 1200, Alfonso VIII of Castile invades the county of Alava and lays siege to the city of Vitoria.

The elizates were Abadiño, Berriz, Mallabia, Mañaria, Iurreta, Garai, Zaldibar, Arrazola, Axpe, Apatamonasterio, Izurtza and San Agustin-Etxebarria, while the four towns were Durango (also the capital), Elorrio, Ermua and Otxandio.

In 1578, long after the incorporation of the county into the Lordship of Biscay, the House of Astola is acquired and the meetings start taking place there.