Spanish Prime Minister Mariano Rajoy confirmed his passing on Twitter yesterday.
The head of Spain's federal prosecutorial office had been in the position for just under a year.
Most recently, he was leading the charge against eight of the 14 members of the now ousted regional government in Catalonia who were charged with sedition for unconstitutionally seeking independence from federal Spain.
Maza was unwell while travelling, headed to an emergency room in Buenos Aires and shortly thereafter he died.