The Lex Ursonensis[1] is the foundation charter of the Caesarean colonia Iulia Genetiva at Urso near Osuna (province of Seville, Andalusia) in southern Spain.

[2] The original law spanned nine tablets with three or five columns of text each and comprised over 140 sections (rubricae).

The charter was approved by the Roman assembly as a law proposed probably by Mark Antony after the assassination of Julius Caesar.

Even though other laws from outside Hispania have been preserved, it can be asserted that the texts found in the Iberian Peninsula are a fundamental source for understanding the vast phenomenon of provincial legal Romanization.

[6] The law addresses a wide range of local governance issues:[7]