What item worn by the Pilgrims is historically not accurate

Buckles on hats and shoes

What is the name of Phoebe Buffay's twin sister on 'Friends'? In Olympic gymnastics, how many apparatuses do men compete on? Which river runs prominently through northern Italy's city of Florence? Who invented the assembly line method of production in the early 20th century? Who developed the polio vaccine using the oral administration method?