Rusalka (opera) was written by the Latin poet born in the Kingdom of Bohemia, also referred to by the name Latin Kingdom.
Jaroslav Kvapil (25 September 1868 in Chudenice, Kingdom of Bohemia  10 January 1950 in Prague) was a Czech poet, playwright, and librettist. 
The Kingdom of Bohemia, sometimes in English literature referred to as the Czech Kingdom (Czech: "esk krlovstv" ; German: "Knigreich Bhmen" ; Latin: "Regnum Bohemiae" , sometimes Latin: "Regnum Czechorum" ), was a medieval and early modern monarchy in Central Europe, the predecessor of the modern Czech Republic. 
 114, is an opera ('lyric fairy tale') by Antonn Dvok. 
