King Christina of Sweden (all Swedish monarchs were given the title of King regardless of gender; on
King Christina of Sweden (all Swedish monarchs were given the title of King regardless of gender; only the spouse of a monarch would be called Queen) was terrified of fleas. So, logically, she bought a tiny 10 cm. long cannon so that she could fire miniature cannonballs at the fleas that infested the royal bedchamber. It is not known whether she ever managed to hit any. -- source link
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