Pennsylvania Station (1910–1963) in the context of "Moynihan Train Hall"

Daylighting is the practice of placing windows, skylights, other openings, and reflective surfaces so that direct or indirect sunlight can provide effective internal lighting. Particular attention is given to daylighting while designing a building when the aim is to maximize visual comfort or to reduce energy use. Energy savings can be achieved from the reduced use of artificial (electric) lighting or from passive solar heating. Artificial lighting energy use can be reduced by simply installing fewer electric lights where daylight is present or by automatically dimming or switching off electric lights in response to the presence of daylight – a process known as daylight harvesting.

The amount of daylight received in an internal space can be analyzed by measuring illuminance on a grid or undertaking a daylight factor calculation. Computer programs such as Radiance allow an architect or engineer to quickly calculate benefits of a particular design. The human eye's response to light is non-linear, so a more even distribution of the same amount of light makes a room appear brighter.

The Baths of Caracalla (Italian: Terme di Caracalla) in Rome, Italy, were the city's second largest Roman public baths, or thermae, after the Baths of Diocletian. The baths were likely built between AD 212 (or 211) and 216/217, during the reigns of emperors Septimius Severus and Caracalla. They were in operation until the 530s and then fell into disuse and ruin.

Both during and since their operation as baths, they served as inspiration for many other notable buildings, ancient and modern, such as the Baths of Diocletian, the Basilica of Maxentius, the original Pennsylvania Station in New York City, Chicago Union Station and the Senate of Canada Building. Artworks recovered from the ruins include famous sculptures such as the Farnese Bull and the Farnese Hercules.

The New York City Landmarks Preservation Commission (LPC) is the New York City agency charged with administering the city's Landmarks Preservation Law. The LPC is responsible for protecting New York City's architecturally, historically, and culturally significant buildings and sites by granting them landmark or historic district status, and regulating them after designation. It is the largest municipal preservation agency in the nation. As of July 1, 2020, the LPC has designated more than 37,800 landmark properties in all five boroughs. Most of these are concentrated in historic districts, although there are over a thousand individual landmarks, as well as numerous interior and scenic landmarks.

Mayor Robert F. Wagner Jr. first organized a preservation committee in 1961, and the following year, created the LPC. The LPC's power was greatly strengthened after the Landmarks Law was passed in April 1965, one and a half years after the destruction of Pennsylvania Station. The LPC has been involved in several prominent preservation decisions, including that of Grand Central Terminal. By 1990, the LPC was cited by David Dinkins as having preserved New York City's municipal identity and enhanced the market perception of a number of neighborhoods.

The James A. Farley Building (formerly Pennsylvania Terminal and the U.S. General Post Office) is a mixed-use structure in Midtown Manhattan, New York City, which formerly served as the city's main United States Postal Service (USPS) branch. Designed by McKim, Mead & White in the Beaux-Arts style, the structure was built between 1911 and 1914, with an annex constructed between 1932 and 1935. The Farley Building, at 421 Eighth Avenue between 31st Street and 33rd Street in Midtown Manhattan, faces Pennsylvania Station and Madison Square Garden to the east.

The main facade of the Farley Building (over 8th Avenue) features a Corinthian colonnade finishing at a pavilion on each end. The imposing design was meant to match that of the original Pennsylvania Station across the street. An entablature above the colonnade bears the United States Postal Service creed: "Neither snow nor rain nor heat nor gloom of night stays these couriers from the swift completion of their appointed rounds." The colonnade's inner ceiling is decorated with the crests or emblems of ten major nations that existed at the building's completion. The remaining three facades have a similar but simpler design.