Inferno Metal Festival is an annual extreme metal festival that takes place every year during Easter in Oslo, Norway. The festival was founded by Borknagar guitarist Jens F. Ryland in cooperation with Radar Booking in 2001 and takes place at Rockefeller Music Hall.

Emperor is a Norwegian black metal band formed in 1991, regarded as highly influential by critics and emerging black metal bands. The group split up in 2001, but reunited from 2005 to 2007 for a few festival dates and brief US tours, and again reunited in 2013 to 2014. Emperor reformed for the third time in 2016. The group was founded by Ihsahn (guitar/vocal) and Samoth.