Igor Stravinsky and Richard Wagner were both influential composers in what era?
Igor Stravinsky:  He is widely considered one of the most important and influential composers of the 20th century. Richard Wagner: Wilhelm Richard Wagner ( ; ] ; 22 May 181313 February 1883) was a German composer, theatre director, polemicist, and conductor who is primarily known for his operas (or, as some of his later works were later known, "music dramas").
20th century