Born June 4, 1871, in Podebrady; died Nov. 19, 1943. Czech historian and paleographer.
Friedrich started teaching at Charles University in Prague in 1898, first as docent and then, from 1904, as professor of auxiliary historical disciplines. His published works are source books on medieval Czech history; he also edited medieval documents, such as the Codex diplomaticus et epistolaris regni Bohemiae (vols. 1–4, Prague).
WORKSUčebná kniha palaeografie latinské. Prague, 1898.
O zakládnaci listine kapituly litoměřcké. Prague, 1901.
O neznámé listine krála Václava I, pro klášter Ostrovský. Prague, 1943.