Simplify the following text for a Grade 10 native English-speaking person.
Original: Spanish conquistador , or conqueror , Francisco Pizarro , however , officially refounded Cusco on March 23 , 1534 , naming it the `` Very noble and great city of Cusco '' .
Simplified: Francisco Pizarro officially arrived in Cusco on 23 March 1534 , renaming it the `` Very noble and great city of Cuzco '' .