"GRAPHIC MADRID" is not to be found in Fodor's Guides. It is an architect's eye view of old, lovely buildings, which sometimes means turning them inside out. The drawings in this show, now at the Octagon Museum, were done by architectural students at the Escuela Tecnica Superior de Arquitectura de Madrid. The buildings were haphazardly chosen -- no Prado here; some were selected for the very fact of their neglect. What's interesting is that the students have captured not just the requisite lines of the buildings but also their texture, color and light.

The edifices range from tidy tile roof apartment houses peppered with wrought-iron balconies, to the Church of San Nicolas de los Servitas, one of the oldest in Madrid. The church's steeple dates from the 12th century and the exterior walls exhibit the varied bricks of successive restorations.

Some things are not as they seem. The lofty interior of the turn-of-the-century Church of San Manuel y San Benito -- its dome and its lavish decoration -- recalls an Islamic mosque. And a spatial analysis of the Stock Exchange reveals its similarities to a cathedral.

"Graphic Madrid" is a rather different view of the city than can be seen in picture postcards -- deftly done and beautiful, challenging the constraints of architectural drawing.

GRAPHIC MADRID -- Through August 16 at the Octagon Museum, 1799 New York Ave. NW.