tekfur sarayi, byzantine palace in istanbul, turkey

age anatolia ancient angel apse arch archaeology architecture bosporus byzantine byzantium capital castle century christ christian christianity church city civilization constantinople constantine culture dome east eastern emperor empire era europe european faith fortress gold golden heritage historic historical history holy imperial islam istanbul justinian landmark medieval metropolis metropolitan mosque museum muslim palace pillar power purple religion relics remnants renovation restore restoration roman rome ruin ruins sarayi sophia sultan symbol tekfur tower travel turkey unesco venice victory wall walls war