Paul Mus, wartime De Gaullist leader in Indo-China and an authority on Indo-Chinese archaeology, will deliver a lecture at 4 p.m. this afternoon in the Fogg Art Museum.

The subject of his lecture will be "Sacred Indian Architecture in Cambodia." A film, "Temples of Angkor," will illustrate the talk. The lecture, which is sponsored by the Harvard-Yenching Institute, will be open to the public without charge.

Now director of the Ecole Nationale de la France d'Outre Mer and professor at the College de France, Mus is a well-known specialist in Sanskrit and Annamite and has spent many years in Southeast Asia and the East Indies.