Concerning accomodation you find a list of all the hotels in Graz at the internet-site http://www.graztourismus.at    (=> Menu item "Hotels/...")
or alternatively contact:
Graz-Information
Herrengasse 16
A-8010 Graz
phone: +43 316 8075-0
fax: +43 316 8075-15
e-mail: info@graztourismus.at