1. 1582
    Urban Legends ★★★★★ Italy (Rome)

    The Missing 10 Days of 1582

    If you display October 1582 in a smartphone calendar, the 4th is followed by the 15th, with ten days missing. The cause is the calendar reform (the Gregorian calendar) by Pope Gregory XIII, which really did skip ten days.

  2. Medieval Europe
    Urban Legends ★★★★★ Europe

    Philosopher's Stone

    A legendary substance of alchemy believed to turn metals such as lead into gold, and even to grant immortality when drunk. Many alchemists of medieval Europe sought to make it, and a legend says the Paris scribe Nicolas Flamel succeeded.