Fernão Nunes, also known as Fernao Nuniz, was a Portuguese traveler, chronicler and horse trader who spent three years in Vijayanagara, capital of the Vijayanagara Empire in the time period 1535-1537 CE. His writings have brought to light many interesting details about Vijayanagara at that time, including construction of massive fortification works, watch towers and security walls. From his notes it is known that the expansion of the regal capital limits happened during the rule of King Bukka Raya II and Deva Raya I.