Antico Caffè Greco Opens on Via dei Condotti
ESTIMATED75% CONFIDENCEWikipedia[1] says it "opened in 1760 on Via Condotti" and names no month or day, so the pin takes that year's last day.
Antico Caffè Greco opened in 1760 a few steps from the Spanish Steps and became the room where the Grand Tour sat down - Keats, Byron, Goethe, Stendhal and Casanova among the names attached to it. It is the oldest cafe in Rome, and has spent recent years fighting its landlord in court over the rent on the premises it has occupied for more than two and a half centuries.