James Naismith
Google
I visited all the Norman Byzantine cathedrals of Sicily, all are wonders to behold. However, this place is truly a wonder. The exquisite stone masonry, the mosaics, the sheer opulence and scale of the cathedral makes it a landmark. The view across Palermo from the high points is a further reason to make it a must see. The local buses take you up the hill to get there, it's a short climb after that. For me the stonework and the mosaics were astounding. The Baroque chapel to the side, is overdone (IMHO) but of course, Baroque is what it is. The chapel fortunately is kept out of the marvellous central space.