Over the years, many buildings are adapted and their original facades are only known by studying their history or evolution through images. Building renovations often prioritize their new needs and treatments are carried out to adjust to them to the detriment of other aspects such as natural lighting. In the Octavio Méndez Pereira Campus of the University of Panama (UP), there are many buildings that have undergone countless reforms. In this case, the present work focuses on observing the evolution of the reforms of the Faculty of Nursing of the UP, and evaluating its performance in terms of natural lighting. Three classrooms (room 1, 2 and 7) were chosen to measure the levels of internal natural lighting (lux) with three EXTECH SDL400 luxometers. During the period of the internal measurements, the external illumination was in a range between 13,380lux and 27,700lux. The highest level of internal natural light was observed in room 1 with an average of 164lux and the lowest levels were found in room 7, with an average of only 17 lux for the entire space; both below the lighting levels required for this type of environment.