Tonight an old friend, Peter, was in town doing a choir conference for my parish (actually he's been doing it since Thursday). He was addressing the entire church after Vespers and he was giving us a history lesson that tied into the why's of Liturgical music just before he taught us all two new antiphons. As he gave this mini-history lesson he mentioned the length of the nave at Hagia Sophia and said that it's 70-80 metres long. Being that Peter is from Toronto this is excusable but being that his entire audience is American it's frustrating. I thought to myself, "Now how am I suppose to know now long 70-80 metres is?" And then I remembered Elizabeth's post and the comment section in which she mentioned a brief rule of thumb for doing conversions so I quickly did the math and figured it out. It was a rough estimate but at least it put me into the right ball park. Until then his whole point was lost on me!