This is "Vltava" (Moldau) from "My Country" (Má Vlast), a cycle of symphonic poems composed in 1872-74 by Bedřich Smetana (1824-1884).
The Vltava is the longest river in the Czech Republic, running north from its source in Šumava through Český Krumlov, České Budějovice, and Prague (Praha), merging with the Elbe (Labe) at Mělník. It is 430 km long and drains about 28,090 km2; at their confluence the Vltava actually has more water than the Elbe, but joins the Elbe at a right angle to its flow so that it appears a mere tributary. Several dams were built on it in the 1950s, the biggest being Lipno Dam in Šumava.
Performance: Czech Philharmonic Orchestra conducted by Václav Talich (1883-1961). Recorded in the Rudolfinum, Prague: June 1954.
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