Just as we consider symmetrical faces to be beautiful the same judgment we apply to architecture and interior design.
The use of patterns is traceable back to the Ottoman art. The sultans loved using recurring patterns and were not afraid to show it! Topkapi palace is the best example of using rich and heavy tiles for decorating interiors and outside walls.
From the buildings of Balat neighbourhood, the shiny mosaic lamps hanging in small shops, the spices in bazaars to the graphics on the walls this city's vibe is all about the mix of colour.