Conversation so far:
Did Varg commit any arson?
Vikernes was found guilty of several of these cases.
When was the first case?
On 6 June 1992, the Fantoft Stave Church, dating from the 12th century and considered architecturally significant, was burned.

Question: Why did he burn it?
Self-contained rewrite: Why did Varg Vikernes burn Fantoft Stave Church?