1987 Copernicus 500th Anniversary 20 Złotych

This 1987 Polish 20 Złotych coin features Copernicus gazing at a stylized solar system, a nod to his heliocentric theory that upended medieval astronomy.

The obverse shows his portrait, while the reverse includes a globe and orbiting planets, all struck in sterling silver by the Warsaw Mint. That makes it a tangible link to Poland's scientific heritage, though the exact number of pieces produced remains unclear—records from that era can be spotty.

Edge lettering reads "Rzeczpospolita Polska," standard for the denomination, but the coin's diameter of 38.61 millimeters gives it a substantial feel in hand. I once traded one for a lesser piece; the buyer thought it was cursed by old ghosts, but that's just collector superstition.

Design-wise, it's straightforward, no frills, which is refreshing in a field full of embellishments.