GOT is loosely based on 'The War of The Roses' an English civil war regarding succession of The English Throne between the two noble houses York and Lancaster, the civil war lasted from the years 1455 to 1485/87. So, more accurately the mid-to late 15th century.
@@lailadobb9221 In my opinion Sansa is an amalgamation of Elizabeth Woodville, Elizabeth of York and Queen Elizabeth I. The three Queens lives seem to mirror different stages of Sansas life.