oh, I don't know, it's been a very interesting discussion. Consider religious painting some way into the Renaissance, in which saints would be showin wearing European clothes in Alpine scenery. I think you underestimate the general ignorance of society and the comparative lack of communication - mariners might have known which way to sail towards the Holy Land, but it doesn't follow that peasants, or bishops or architects, would ever have spoken to them about it. I imagine everyone would have heard of the Holy Land but quite possible that few knew of the Mediterranean.
Anyway, to answer your question, here's a quote I found: "Many sacred buildings, from Greek temples to megalithic passage-graves, face the rising sun as the source of new life and power. In most Christian churches a similar point is made. One enters from the west and progresses toward the altar at the east, moving from darkness to light and from death to life. Early English churches often deviate slightly from true East, a variance that can be traced to the position of the rising sun on the day of the saint to whom the church is dedicated. Sometimes accurate alignment is deliberately avoided, to create a special meaning. In some English cruciform churches, the chancel is skewed to represent the head of Christ falling sideways on the cross."