Ramón de Castellazuelo was a Bishop of Zaragoza between 1185 and 1216 AD.
[1] As Bishop, he continued construction on the Cathedral of Zaragoza which his predecessor Pedro Tarroja had begun.
[2] The project maintained the old mosque, converted into a church, but added it to a head, five apses and a doorway flanked by two square towers.
He accompanied King Pedro III of Aragon[3] in the campaign against Rincón de Ademuz in 1212, participating in the Siege of Al-Dāmūs and Castellfabib.
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