Renaissance Architecture 

The scholarly Encylcopedias of art history are all heavily illustrated with reliable images.

General
Encyclopedia of world art. 18 vols.  New York, McGraw-Hill 1959-1987.  Lilly  N31 .E4833 1960 
   Major English-language essay-length scholarly encyclopedia.  Articles are signed by major art historians.  Half of every volume is plates. 

Ancient Art
Enciclopedia dell’arte antica, classica e orientale.   Rome, Istituto della Enciclopedia italiana. 7 vols.  1958-1966.  Lilly  N31 .E48 1958 - often times Renaissance architecture is dependent upon classical situations of space.
  
Medieval
Enciclopedia dell’arte medievale.  Rome, Istituto della Enciclopedia italiana, 1991-2002.  12 vols.   Lilly N5965 .E52 1991  

German-Language
Propyläen Kunstgeschichte. 18 vols. Berlin: Propyläen Verlag, 1966-1974.  Lilly N5300 .P76