This document discusses building facades and provides examples of innovative facade designs from around the world. It covers the functions of facades, lessons that can be learned from nature, modern trends like greening and the use of nanomaterials, and desirable properties for facades like self-cleaning and self-repairing capabilities. Examples of innovative facades include buildings inspired by termite nests, yurts, and pneumatic structures, as well as modern designs using vacuum insulation, dynamic envelopes, and responsive materials.