Archbishop Welby’s liturgical Roman holiday

What was the Most Rev. Justin Welby, the Archbishop of Canterbury, doing in the Eternal City?

Ecumenism is not usually a topic that generates excitement online. But Catholic social media was buzzing this week over events in Rome involving the spiritual leader of the Anglican Communion.

The Most Rev. Justin Welby, the Archbishop of Canterbury, outside of St Paul's Cathedral, London, on Feb. 4, 2013. © Mazur/catholicnews.org.uk. 

What was the Most R…