[1][2][3] Founded in 1958 by the Estornés Lasa brothers, Bernardo and Mariano.
Since 1996, Eusko Ikaskuntza has taken over the task of digitizing, cataloging and putting it on the network.
[5] The new encyclopedia is based on the Auñamendi encyclopedia by Bernardo Estornés Lasa, which began in 1933 and whose first and last volumes were released in 1960 and 2008 respectively.
[7] The contents of the Auñamendi Encyclopedia are generated by a large group of specialists in different subjects who guarantee the level of quality and scientific rigor of the encyclopedia.
[8] All contributions are analyzed and contrasted by the experts at Eusko Ikaskuntza.