Only three times, till now.
2005/07/14-Amon Amarth -Zadar (Croatia)
2006/11/8-Amon Amarth, Wintersun, Tyr - Zagreb (Croatia)
2009/03/22-Amon Amarth, Obituary, Legion of the damned, Keep of Kalessin -Zagreb (Croatia)
(Next show is allready scheduled for november the 16th 2011. also...