Age of Empires II (E148 2/2) An unlikely alliance

Ivaylo has killed the Tsar and now people are fighting for power. The wife of the Tsar is now looking for an alliance with someone to help her. The Boyars are not to be trusted and so Ivaylo is her best hope. With an alliance made we now need to show that we are deserving of ruling these boyars.
There is a chapel, and if we can capture it and keep it for long enough we will show that we are worthy and chosen by the gods to rule..... the Boyars wont just sit down and allow this.... wait why are the Romans here?