Kate Middleton Wore a Vintage Polka-Dot Oscar De La Renta Dress

Pretty in pink? Try pretty in purple. For her second day in Ireland, Kate Middleton stepped out in a vintage Oscar de la Renta dress that featured black polka dots, a puff collar, and bold black details at the waist and cuffs. The occasion was a stark contrast to the day's earlier stop at the Teagasc Research Farm.

Kate, along with Prince William, paid a visit to Dublin's Museum of Literature. There, according to Town & Country, the two royals checked out a signed edition of James Joyce’s Ulysses and William spoke to the crowd.

<p>WPA Pool/Getty Images</p>

WPA Pool/Getty Images

RELATED: Kate Middleton Wore Two Completely Different All-Green Outfits In Ireland

"Today, our relationship goes far beyond two countries that are simply neighbors. 'We are firm friends and equal partners,' my grandmother put it," William said, using his grandmother's famed words. "The links between our people, businesses and our culture are inextricable, and we should all be proud to see how strong those bonds are. As we look ahead to some changes in our relationship, we must never forget how far we have come together in recent decades in transforming the relationships across our two islands."

RELATED: Kate Middleton Just Debuted a Shorter, Sleeker Hairstyle

Kate's wore black pumps with the knee-length dress and carried a simple black clutch. It's not the first time she's gone vintage, however. Back in 2011, she wore a white gown from designer Amanda Wakeley, which was actually from 2006. And Oscar de la Renta is no stranger to having archival pieces pop up on the red carpet. The label made a surprise appearance at this year's Oscars, when Joanne Tucker, Adam Driver's wife, wore a vintage gown to the ceremony. Kate modernized the look with a puffy ponytail and simple silver hoops. Vintage or not, she looked like a modern-day royal.