Paul Hindemith (16 November 1895 – 28 December 1963) was a German composer, violist, violinist, teacher and conductor. He was born in Hanau near Frankfurt and died in Frankfurt. Despite a prolonged decline in his physical health, Hindemith composed almost until his death. Wikipedia has more information about him in English and German.
The following link takes you to a slightly easier text than the German Wikipedia text: Paul Hindemith
If you’d rather find out about him in English and prefer to listen than read, watch this YouTube video.
Or you could just sit down and enjoy some of his music.
If you search YouTube, you will find lots more videos of his music. Do you have a favourite?