public_html folder ignored

I ran into some trouble with a virtual server. Some days ago it always replied with the Apache2 Default page for the index.html and 404 Errors for all other requests. Since there was nothing important on that server I made a backup, deleted the virual server and created it again (with the backup). It still only showed the Apache Default page and not the content under /home/domain/public_html
I created the server again (without the backup) and just created a index.html file in the public_html folder but this file isn’t shown either - still the Apache2 Default Page.

Distro: Ubuntu 14.10

Any Ideas?

Best wishes,