This paper presents the climate responsive principles of architectural
design evolved through time in the development of indigenous architec
ture. A scientific analysis of settlements at Leh (Ladakh) and Jaisalm
er (Rajasthan) presents their appropriateness in terms of thermal perf
ormance. Principles of architectural design evolved in these settlemen
ts when applied to modern buildings, illustrated through two projects
designed by the author, suggest how low energy architecture, that is,
sustainable, can be developed in the modem context, basically by way o
f architectural design.