Out of Italian Gaetano Donizetti or Czech Bedřich Smetana, which opera composer lived and worked earlier?
Gaetano Donizetti Domenico Gaetano Maria Donizetti (] ; 29 November 1797 – 8 April 1848) was an Italian composer. Along with Gioachino Rossini and Vincenzo Bellini, Donizetti was a leading composer of the "bel canto" opera style during the first half of the nineteenth century. Donizetti's close association with the bel canto style was undoubtedly an influence on other composers such as Giuseppe Verdi (1813–1901).
Leo Blech Leo Blech (21 April 1871 – 25 August 1958) was a German opera composer and conductor who is perhaps most famous for his work at the Königliches Opernhaus (later the Berlin State Opera / Staatsoper Unter den Linden) from 1906 to 1937, and later as the conductor of Berlin's Städtische Oper from 1949 to 1953. Blech was known for his reliable, clear, and elegant performances, especially of works by Wagner, Verdi, and Bizet's "Carmen" (which he conducted over 600 times), and for his sensitivity as an accompanist.