From A Drug-Fueled Car Cash To A ‘Surfeit Of Lampreys,’ These Are The Strangest Royal Deaths In History

Published November 15, 2022
Updated April 10, 2025

King Adolf Frederick Of Sweden Who ‘Ate Himself To Death’

King Adolf Frederick

DeAgostini/Getty ImagesKing Adolf Frederick is best known for his rather embarrassing royal death.

King Adolf Frederick of Sweden was a middling king who would have likely left little mark on history if not for the way he died. On Feb. 12, 1771, the Swedish monarch apparently ate himself to death.

Until that point, Adolf Frederick hadn’t accomplished much. According to Ancient Origins, he was born a younger son of a Swedish noble who, thanks to maneuvering by Elizabeth of Russia, ended up as heir to the Swedish throne. Once there, he was more a figurehead than a ruler.

But though Adolf Frederick had little power, he had a royal appetite. And as the monarch prepared for Lent in 1771, he sat down for a feast fit for a king.

Semlas Royal Deaths

Getty ImagesAfter tucking into a generous feast, Adolf Frederick allegedly enjoyed more than a dozen semlas, a cream-filled Swedish pastry.

On Fettisdagen, or Fat Tuesday, Adolf Frederick tucked into a meal that included lobster, caviar, kippers, sauerkraut, boiled meats, and turnips, all washed down with generous pours of champagne. He might have survived the night if he’d stopped there, but the king also called for a dessert.

After his feast, Adolf Frederick enjoyed semlas, Swedish pastries filled with cream that were traditionally eaten on Fat Tuesday. Not only did the king feast on 14 of these pastries, but he also enjoyed them alongside a bowl of hot milk flavored with cinnamon and raisins.

Unsurprisingly, he complained of a stomachache soon afterward. The king’s stomachache got worse and worse, until Adolf Frederick died, apparently from severe digestive problems. His embarrassing royal death cemented the king in history and, indeed, he’s remembered for little else.

author
Kaleena Fraga
author
A senior staff writer for All That's Interesting since 2021 and co-host of the History Uncovered Podcast, Kaleena Fraga graduated with a dual degree in American History and French Language and Literature from Oberlin College. She previously ran the presidential history blog History First, and has had work published in The Washington Post, Gastro Obscura, and elsewhere. She has published more than 1,200 pieces on topics including history and archaeology. She is based in Brooklyn, New York.
editor
Jaclyn Anglis
editor
Based in Brooklyn, New York, Jaclyn Anglis is the senior managing editor at All That's Interesting, where she has worked since 2019. She holds a Master's degree in journalism from the City University of New York and a dual Bachelor's degree in English writing and history from DePauw University. In a career that spans 11 years, she has also worked with the New York Daily News, Bustle, and Bauer Xcel Media. Her interests include American history, true crime, modern history, and science.
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Fraga, Kaleena. "From A Drug-Fueled Car Cash To A ‘Surfeit Of Lampreys,’ These Are The Strangest Royal Deaths In History." AllThatsInteresting.com, November 15, 2022, https://allthatsinteresting.com/weird-royal-deaths. Accessed September 6, 2025.