Opetherion has seen concerts during 14 years.

Year   Concerts Seen  
2017 3 concerts
2016 7 concerts
2015 6 concerts
2014 10 concerts
2013 7 concerts
2012 15 concerts
2011 18 concerts
2010 12 concerts
2009 5 concerts
2008 4 concerts
2005 2 concerts
2004 2 concerts
2003 2 concerts
2002 1 concert