Is Henryk Wieniawski a 19 or 20 century composer? He wrote some concertos, and stuff. :]?

Question

Please helpp!!! He lived from 1835 to 1880.
does that mean he goes into the 19th century?

Answer 1

1835 to 1880 is clearly 19th century. Had he lived a bit longer, he could have been "turn of the century". To be 20th century, he would have had at least one major work written in the 20th century, _after_ 1901. If some of his major works were first _published_ after 1901, a slim case could be made of him being a 20th century composer.

Answer 2

How would anything in the 1800s ever be considered 20th century?