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On the sign:
[Emblem of Prague] SISTEHIC PAULISPER VIATOR SEDLIBENSAC VOLENS VBIMULTA POPULATUSTANDEM VELINVITUS SISTERE DEBUIT GOTHORU MET VANDALORUM FUROR ETLEGE SCULPTUMINMARMORE QVODADPERPETUAM BOEMORUMOMNIUM SEDINPRIMIS VETERO-PRAGENSIUM MEMORIAM ANNO DOMINI MDCXLVIII MARS SVECICUSFERROETICNEINHACTURRIDELINE AVIT HÆCTVRRIS GOTHICIFVIT VLTIMA METAFVRORIS SEDFIDEINONESTHE.CVLTIMA. META BOEMA VOLUISSENTIDIPSUM CIVESVETERO PRAGENSE FUSOSANG VINEIN SCRIBERE NISI PAX AVREA FERDINANDI III PIETATEETI VSTITIA INORBEM GERMANICUMREDUCTA PROSANGVINE AURUM SUPPEDITASSET.
The plaque on the Charles Bridge tower marks the last battle in the 30 year war. In a battle in 1648, the defenders of the city managed to repel the Swedish forces on this bridge.