portal and columns in ulug beg madrassa in the registan of samarkand with flower garden at sunset

registan samarkand madrasa madrasah uzbekistan asia gate portal mosaic facade muslim arch religion sherdor building madrassah central islamic tigers lions historic silk road blue sky cherdor madrassa registon entrance travel landmark uzbek tower sher unesco art texture ornament decor pattern persian lion decorative ornate tiger tile site history asian columns ulug beg flower garden sunset thrportal