When Oscar de la Renta founded his eponymous label in 1965, he had already fine-tuned his skills under the guidance of couturiers at leading European houses. But unlike many of his contemporaries who followed the same trajectory, his designs highlighted a different perspective. From flowing dresses with ruffles and skirt suits in bold prints and colors, de la Renta riffed off the traditional dress of his native Dominican Republic, imbuing his collections with his Latinx heritage…