From Jackie Kennedy to Michelle Obama, first ladies have set fashion trends for many years, using diplomatic outings as opportunities to precise their values and private style. Perhaps one of the vital vital political events is the NATO summit, which occurs a minimum of every other 12 months.

Formed in 1949, the North Atlantic Treaty Organization is currently comprised of 31 countries, including the U.S., England and France. Finland became essentially the most recent ally in April, and the membership will soon include Sweden. NATO’s secretary general, Jens Stoltenberg, announced on Tuesday that Turkey supports Sweden’s bid to hitch NATO only a day before the commencement of this 12 months’s summit.

Since NATO’s inception, heads of state have gathered to debate crucial issues plaguing global politics. First ladies often join their husbands on the summit, hobnobbing with foreign dignitaries at a wide range of events, including dinners, receptions and daytime charity outings.

Ahead of this 12 months’s convention in Vilnius, Lithuania, a glance back at U.S. first ladies’ fashion through the NATO summit.

Nancy Reagan

While arriving in Berlin for the 1982 NATO summit, Nancy Reagan wore a ribbon-trimmed skirt suit over a plaid pussy bow shirt.

Hillary Clinton

President Bill Clinton and First Lady Hillary Clinton hosted a White House dinner in honor of the annual NATO summit in 1999. For the occasion, Hillary Clinton wore a pale yellow pantsuit and an identical set of gold jewelry.

Michelle Obama

In the course of the 2009 NATO summit, which took place in cities in France and Germany, First Lady Michelle Obama wore a fuchsia floral midi dress by Thakoon, which she paired with black kitten heels. Her look included a coordinating black overcoat.

For a night outing through the 2009 NATO summit, Michelle Obama sported a black sleeveless knit dress with a ruffled skirt by Azzedine Alaïa. She accessorized with hoop earrings and a chunky bangle bracelet, in addition to a pair of round-toe patent leather pumps.

Melania Trump

While attending a reception and dinner on the 2018 NATO summit in Brussels, Belgium, First Lady Melania Trump donned a sleeveless tulle midi dress with floral embroidery Elie Saab. She also added on a pair of nude Christian Louboutin pumps.

In 2019, Melania Trump attended a reception on the annual NATO summit in a canary yellow high-neck Valentino cape, which she paired with purple suede Christian Louboutin heels.

Jill Biden

First Lady Jill Biden suited up for the 2022 NATO summit in Madrid, wearing an all-white ensemble paired with layered pearl necklaces and open-toe black pumps featuring crystal embellishments.