Jon Mirena Bitor Castañares Larreategui (1925 – 5 May 2015)Olga Saez. «Jon Castañares (1925-2015). Notario de la democracia». Bilbao. núm. 304. Junio de 2015. p. 29. was a Spanish politician and economist. He was known for being a strong supporter of Basque nationalism. He served as mayor of Bilbao from 1979 to 1983. He died in Bilbao at the age of 90.Fallece Jon Castañares, el primer alcalde de Bilbao tras las elecciones democráticas
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