The head of the Bosnian Church was always favoured by Tvrtko , and exerted significant influence on the matters of state , serving as Tvrtko 's adviser even in 1428 .
Tvrtko was trying to present himself as a good Catholic .
The head of the Bosnian Church was always favoured by Tvrtko , and exerted significant influence on the matters of state , serving as Tvrtko 's adviser even in 1428 , while Tvrtko was trying to present himself as a good Catholic .