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Oversized sunglasses - Jackie incorporated these enormous glasses into her standard wardrobe likely for a sense of privacy, but they also lent her an air of understated stardom.

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Headscarves - The easiest way to make casual outfits look chic is by pairing those huge sunglasses with a headscarf.

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The pillbox hat -

Jackie popularized this style of hat, often designed for her specifically by American fashion designers.

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The pillbox hat - She famously wore a pink suit and a pillbox hat on the day her husband was assassinated.

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Monochromatic looks - Jackie taught the fashion world that white on white makes a more powerful visual statement than nautical stripes.

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Perfectly coiffed halo of hair - Her voluminous hairdo was inseparable from her signature look.

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She was having a really great hair day - And she knew it.

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Color-blocking with different pieces - Instead of a traditional gown, the First Lady opted for a black square-neck top and a marigold yellow floor-length skirt, accented with bright white gloves.

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Elbow-length gloves - The First Lady loved finishing off her formal attire with a pair of long white gloves, which also made an appearance in her more casual outfits as well.

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Strapless gowns - A bit of a daring move in the 1960s, Jackie pulled off demure strapless gowns with grace.

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The off-the-shoulder trend is still going strong - She matched the White House's royal guests with ease.

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She even pulled off the single-shoulder dress - Her state dinner gowns were showstoppers every time.

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Sticking to the basics - She looks effortlessly chic in a ribbed turtleneck paired with no-frills pants.

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Stylish coats - Long before Meghan Markle, Jackie's seemingly endless array of smart coats captured the public's attention.

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Stylish coats - The First Lady had many coats that made a statement while requiring minimal effort on her part. And who doesn't want maximum effect with minimal effort?

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The trademark collar - Not quite a turtleneck or a crew neck, Jackie favored the elegant and elevated cut on dresses, blouses, and jackets.

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Playing with patterns - She could go from sharp presidential looks to playful patterned cocktail dresses without batting an eye.

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Experimenting with shapes - Though the A-line was a popular choice for her and many others at the time, Jackie played with boxy tops and shaped skirts, and vice versa.

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Dialing up the contrast - By using standout colors or juxtaposing light and dark, Jackie threw outfits together that would be remembered for years after her passing.

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A bold woman needs a bold cape - She had some dramatic pieces in her wardrobe, and the cape was one of them.

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A bold woman needs a bold cape - Long or short, plain or patterned, she tried them all. 

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The mature use of bows - Jackie often used bows to either add some femininity to more masculine outfits or to accentuate her waist.

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The mature use of bows - She showed that bows don't have to be left to young girls' ponytails, but that they can be used with class and style.

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Equestrian-inspired aesthetic - With an extensive past in horseback riding, Jackie popularized the casual equestrian style of high collars, fitted jackets, and high boots.

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Mystery-chic - If you ever want to look like a woman who has a great depth beneath her surface, model your outfit after this one.

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Having confidence in your basics - She could wear a very simple all-black outfit but pair it with items of her own unique style, whether it was loafers and white gloves or pearls and a mile-high hairdo.

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Queen of the waistline -

Endowed with a characteristic slim waist, Jackie knew how to make her wardrobe work for her own shape.

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Embracing the dynamism of a belt - She showed that an ornate belt can both shape your waist and draw attention to it, and that it can also break up too much of the same color.

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Keeping up with your decade - In her 40s, Jackie was still embracing the times and rocking styles of the '70s.

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She passed her style on - Like a good mother, Jackie was often seen coordinating the First Family's outfits as soon as they could walk. 

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And finally, the invisible accessory -

She had a signature fragrance that she wore almost daily, called Lovely Patchouli 55. It mixed notes of bergamot and amber with a musky patchouli.

Check out these surprising little-known facts about life in the White House.

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