Is cwm rhondda and the German national anthem the same tune?

Yes, "Cwm Rhondda," a Welsh hymn, and the German national anthem, "Das Lied der Deutschen" (The Song of the Germans), share the same melody. The tune of "Cwm Rhondda" was composed by John Hughes in 1905, while the melody for the German anthem was originally composed by Joseph Haydn in 1797. However, the two songs have very different lyrics and cultural significance.