The Katholikon Church
The Palace Chapel
The Westwork of the Monastic Basilica of Corvey
Above is a site that goes into detail over the Byzantium period. It also focuses on the first sights of the mosaic art intertwined with architecture. Below is the site review.
Accuracy– I found this site to be accurate in the information collected over the Byzantine Architecture. This site goes into detail about what defines the Byzantine architecture from the rest of the ancient art and even focuses on the interior aspects.
Authority– The site was created by Chuck LaChiusa, however, the information on the site is inserts from A History of Architecture on the Comparative Method by Sir Banister-Fletcher and the Britannica Encyclopedia which is definitely accurate.
Objectivity-Much like the other sites you will find on this site, I believe the objective is to inform people on the historic era.
Currency– The info on this site was last updated in 2003.
Coverage-This site only covers the Byzantine period.