We often celebrate the work of famous architects. We know the names of Santiago Calatrava and Daniel Burnham, for example. But what of the folks who work in relative obscurity, designing the city around us from their desks at City Hall or the Municipal Building? Lately, I keep bumping into the name of Charles E. Malig, who - though he designed a couple public schools while in private practice - built many public buildings during his 38 years as a staff architect with the city's Bureau of Bridges and Public Buildings.