Bulgar Victoria

This timeline speculates the survival of the Bulgarian Empire. If the Bulgarians had turned back the mongols, they would have remained one of the dominant powers of Europe. If the Bulgarian Patriarch united with the Roman Catholics, the church would have been very strong indeed, perhapes even strong enough to keep the Byzantine Empire alive.

However, these victories will cost Europeans. Without the mongols, knowledge of gunpowder arrives 200 years late. With no need to find an alternate route to Asia, the Vikings are the only Europeans to discover America. Although in this timeline their colonies survive, most Europeans are not widely aware of this until the late 1600s. Asian colonization got to North America first.