509 BC
Right of appeal instituted (Lex Valeria de provocatione)
A citizen sentenced to capital or corporal punishment has a right of appeal to the people (comitia centuriata).
Titus Livius. The History of Rome Books I-8. Translated by D. Spillan. London. HENRY G. BOHN, YORK STREET, COVENT GARDEN. MDCCCLIII. JOHN CHILDS AND SON, BUNGAY. Project Gutenburg. Release Date: November 6, 2006. [EBook #19725] Pages 73.