Original: Francisco Vásquez de Coronado y Luján ( 1510 & ndash ; 22 September 1554 ) was a Spanish conquistador , who visited New Mexico and other parts of what are now the southwestern United States between 1540 and 1542 .
Simplified: 1510 -- September 22 , 1554 ) was a Spanish conquistador , who visited New Mexico and other parts of what are now the southwestern United States between 1540 and 1542 .