Alphonsus Ciacconius

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Alphonsus Ciacconius OP
Born	c. 15 December 1530  Baeza (Crown of Castile)
Baptised	15 December 1530
Died	14 February 1599  (aged 68) Rome, Papal States
Occupation	Church historian, antiquarian, archaeologist

Don Alphonsus Ciacconius OP (born shortly before 15 December 1530,^[1] Baeza – died 14 February 1599, Rome) was a Spanish Dominican scholar in Rome. His name is also spelt as Alfonso Chacón and Ciacono. Chacón is known mainly for two of his works: Historia utriusque belli dacici a Traiano Caesare gesti (Rome, 1576), and Vitae, et res gestae pontificum romanorum et S.R.E. Cardinalium ab initio nascentis ecclesiae usque ad Clementem IX. P.O.M. Alphonsi Ciaconii Ordinis Praedicatorum & aliorum opera descriptae (Rome, 1601).