The Good:
The temple was created near 537AD. Nearly one thousand years later, it becomes a mosque. Byzantine art exhibited in the interior was destroyed or completely replaced by Muslim-Ottoman inspired drawings.Since then it served as a model for many other Muslim mosques.
Some of the old byzantine work has been restored, and enables us to witness the spatial information design, the ways the building was intended to be, and some of the design can now be justified.
Major example includes an icon on top of the Sanctuary space facing east The whole space was--designed to introduce extra Information on this icon.

The Bad:
A Mystery sharp pyramid-shaped building:
Ryugyong Hotel Pyongyang, North Korea‐
dominates the skyline of the city.
Construction started in 1987, and in 1992 it was abandoned.
Building is empty, until December 2008 where supposedly construction started again.