5-Suit Card Decks
Spade, heart, club, diamond, and... Star? For some card games, there is a fifth suit that gets utilized. Most of them are old and rarely played anymore, but five-card bridge is slowly making a comeback.
Five of a Kind
Five-suit poker and five-suit bridge were popular games in the 1940s and 50s, but as the popularity of simpler card games grew, the fifth suit became obsolete. Don't think of it as a loss of history, think of it as a general improvement to the overall health of card games.