This paper discusses the thermal comfort performance of the Frank Lloyd Wright Freeman House using dataloggers, comparative graphs and comfort charts. The Freeman House was designed by FLW in 1924 for Samuel and Harriet Freeman and was later gifted to University of Southern California for conservation and study purposes. Building Envelope Environmental Monitoring Services (BEEMS) has installed a wireless sensor network in the house. With the help of recorded data from the network and additional data from Onset and iButton dataloggers, indoor temperature graphs are compared and plotted in Olgyay's Bioclimatic Chart. The analysis of the thermal responses of certain spaces is compared to outdoor climatic conditions and other construction types also. Computer simulations of the house with the help of software like HEED and eQUEST show how alternate glazing and insulation options would impact the house and similar block buildings if constructed today.