Built in 1388, this Haczowie Church of the Assumption of Holy Mary and St. Michael’s Archangel, has the distinction of being the oldest church in Poland. This proof legal tender 20 Zlotych coin was struck by the Polish Mint (Mennica Polska) in 2006 from 28.28 grams of .925 silver for an Actual Silver Weight (ASW) of .8410 ounces.