Jacob Apella was a Jewish financier who served as mint-master under Vladislaus I — his imprisonment around 1124 disrupted Bohemian minting operations sufficiently that numismatists use the event as a chronological anchor for this issue. Cach 551 is among the more precisely dated Bohemian deniers of the period precisely because the political circumstance gives it a fixed terminus.
Jacob Apella was a Jewish financier who served as mint-master under Vladislaus I — his imprisonment around 1124 disrupted Bohemian minting operations sufficiently that numismatists use the event as a chronological anchor for this issue. Cach 551 is among the more precisely dated Bohemian deniers of the period precisely because the political circumstance gives it a fixed terminus.