Martín de Azpilcueta

|birth_place=Barásoain, Kingdom of Navarre, Crown of Castille|birth_date=13 December 1491|death_date=1 June 1586|death_place=Rome, Papal States|school_tradition=Thomism
School of Salamanca|influences=|influenced=|notable_ideas=Quantity theory of money|main_interests=|era=Renaissance philosophy|region=Western philosophy * Spanish philosophy}}

Martín de Azpilcueta (Azpilkueta in Basque) (13 December 1492 – 1 June 1586), or Doctor Navarrus, was a Spanish canonist, theologian and economist.

Renowned in his time, he was the first to formulate the quantity theory of money in 1556 and was with Francisco de Vitoria and Domingo de Soto one of the main thinkers of the School of Salamanca. Provided by Wikipedia