Latvia as its currency since 1 January 2014, replacing the Latvian lats. The name "Latvija" is derived from the name of the ancient Latgalians, one of four Indo-European Baltic tribes (along with Couronians, Selonians and Semigallians), which formed the ethnic core of modern Latvians together with the Finnic Livonians. Henry of Latvia coined the latinisations of the country's name, "Lettigallia" and "Lethia", both derived from the Latgalians. The terms inspired the variations on the country's name in Romance languages from "Letonia" and in several Germanic languages from "Lettland". Around 3000 BC, the proto-Baltic ancestors of the Latvian people settled on the
Baltic State Opera opera "Madame Curie". This work was commissioned by the Baltic Opera, although its first performance took place in Paris in November 2011, within the framework of the Cultural Programme of the Polish Presidency of the EU Council. "Madame Curie" was also the first production in the Opera Gedanensis series, a project which is being realised by the Baltic Opera. Outside of the major operatic repertoire, Polish premieres which took place in the Baltic Opera include: Notes Baltic State Opera Baltic Opera (formerly Baltic State Opera) is an opera company located in Gdańsk, Poland. It began in February 1949 as the