West Loop–LaSalle Street Historic District

The Montauk Building – also referred to as Montauk Block – was a high-rise building in Chicago, Illinois.

Harris Bank Addition II is a 510 ft (160 m) tall skyscraper in Chicago, Illinois. It was completed in 1974 and has 38 floors. Skidmore, Owings and Merrill designed the building in the International style which is the 83rd tallest in Chicago and has 592,000 sq ft (55,000 m2) of floor space. It houses offices and a branch for BMO Harris Bank. The building is located at the southeast corner of Monroe and LaSalle Streets and is set back from the property line of Monroe Street to allow a small plaza and fountain. The addition is part of the Harris Bank complex which consists of the original 20-story building constructed in 1911, a 23-story structure to the east constructed in 1958 and the 38-story tower to the west. The 1958 building was also designed by Skidmore, Owings and Merrill and both additions are faced with glass and stainless steel. The 1958 structure bears the address of 111 West Monroe Street and the 1910 building is at 119 West Monroe Street. Together, these two buildings contain 611,000 sq ft (56,800 m2). All three buildings are connected on 15 floors allowing occupants to cross through the entire complex. The street levels of both additions is recessed to allow for a narrow pedestrian arcade. The second addition houses a Harris Bank branch on the street level while the first addition houses retail stores. The 1910 building was designed by Shepley, Ruttan and Coolidge in the neoclassical style and is 285 ft (87 m) tall. The lower five floors are faced with pink granite while the upper floors are red brick. Two bas-relief sculptures of lions which were used in the bank's logo until a name change in 2011. Above the entrance are four granite columns which extend from the second to fifth floors. The original cornice was removed at an unknown date. The entire complex is managed by CommonWealth Partners, Management Services.

Temperance Temple (also known as Women's Temple or Woman's Temple) served as the headquarters of the National Woman's Christian Temperance Union (WCTU). It was located in Chicago, Illinois at the southwest corner of LaSalle Street and Monroe Street, in the center of city's financial district. Work was begun in July, 1890, and the building was ready for occupancy in May 1892. The lot was valued at US$1,000,000; the rentals from the building were expected to bring in an annual income of over US$200,000. The capital stock was US$600,000, one-half of which was owned by the Temple Building Association of Chicago (TBAC), and it was expected all would be secured to that association. The TBAC, a stock company with Marshall Field president of the board of trustees, owned The Temple, the third of the affiliated interests of the National WCTU. The office building was erected at a cost of US$1,200,000 on ground leased to the TBAC by Field. Temperance Temple was demolished in 1926.

Area code 312 is the telephone area code for downtown Chicago, which includes the Chicago Loop and its immediate environs. The plan area is completely surrounded by area code 773, which serves the rest of Chicago. Both area codes are overlaid with area code 872. 312 is an enclave area code, similar to area code 514 in Montreal and area code 210 in San Antonio. It is roughly bounded by North Avenue on the north, Western Avenue on the west, and 35th Street on the south, with Lake Michigan to the east. In terms of geographic area covered, 312 is one of the smallest area codes in the nation, encompassing only a few square miles.

Area code 773 serves Chicago, Illinois, outside the Loop and the innermost neighborhoods. Originally, all of Chicago and its suburbs were in area code 312. Then, in 1989, area code 708 was created for the suburbs, leaving the city itself in area code 312. By the mid-1990s, Chicago's continued growth and the proliferation of cell phones and pagers made it apparent that the city needed a new area code. It was decided to split off all of the city outside the downtown area as 773. The new area code went into effect on October 12, 1996. Permissive dialing of 312 continued across Chicago until January 11, 1997. On August 10, 2007, the Illinois Commerce Commission announced that area code 872 would overlay area codes 312 and 773; it went into service on November 7, 2009. The Illinois side of the Chicago area–312/773/872, 708, 847/224, 630/331 and portions of 815/779–is one of the largest local calling areas in the United States; with few exceptions, no long-distance charges are applied from one portion of the metro area to another.

Area code 872 is a North American Numbering Plan overlay of telephone area codes 312 and 773 in Chicago, Illinois, and entered service on November 7, 2009. Its overlay status means it is assigned only to new numbers in the area and not to existing numbers using the 312 and 773 area codes. It is the third overlay area code in the region and the tenth area code to serve northeast Illinois.As early as 1998, Neustar, which administers the North American Numbering Plan, had recommended a third area code for Chicago, estimating that 312 and 773 would both exhaust by 2001. However, the Illinois Commerce Commission implemented a series of conservation measures that staved off the need for a new area code. By 2008, a combination of population growth and a large growth in cell phone usage forced the implementation of 872.With the implementation of 872, all local calls in Chicago must be dialed with the full 11-digit phone number (10 digits from cell phones).The Illinois side of the Chicago area–312/773/872, 708/464, 847/224, 630/331 and portions of 815/779–is one of the largest local calling areas in the United States; with few exceptions, no long-distance charges are applied from one portion of the metro area to another.

19 South LaSalle Street, formerly known as the Central YMCA Association Building, is a building in downtown Chicago, Illinois. It was constructed in 1893 and designed by the architecture firm Jenney & Mundie.

U.S. Bank Building, formerly 190 South LaSalle Street, is a 573 feet (175 m) tall skyscraper in Chicago, Illinois. It was completed in 1987 and has 40 floors. Johnson/Burgee Architects designed the building, which is the 57th tallest building in Chicago. From 1988-2016 the lobby of the building featured a tapestry by Helena Hernmarck titled "The 1909 Plan of Chicago" depicting the Civic Center Plaza proposed in the Burnham Plan of Chicago.In May 2013, U.S. Bank announced it agreed to increase its leased space in the structure from 66,000 square feet (6,100 m2) to 110,000 square feet (10,000 m2). The terms of the lease also gave the bank naming rights for the building through 2026.

The Field Building, also known as the LaSalle National Bank Building and Bank of America Building is an art deco office building at 135 South LaSalle Street in the Loop community area of Chicago, Illinois in the United States. The building was designated a Chicago Landmark February 9, 1994.

The Home Insurance Building was a skyscraper that stood in Chicago from 1885 to 1931. Originally ten stories and 138 ft (42.1 m) tall, it was designed by William Le Baron Jenney in 1884 and completed the next year. Two floors were added in 1891, bringing its now finished height to 180 feet (54.9 meters). It was the first tall building to be supported both inside and outside by a fireproof structural steel frame, though it also included reinforced concrete. It is considered the world's first skyscraper. The building opened in 1885 and was demolished 46 years later in 1931.

11 South LaSalle Street Building or Eleven South LaSalle Street Building (formerly Roanoke Building and Tower and originally Lumber Exchange Building and Tower Addition or simply the Roanoke Building and Lumber Exchange Building) is a Chicago Landmark building that is listed on the National Register of Historic Places and that is located at 11 South LaSalle Street in the Loop community area of Chicago, Illinois, United States. This address is located on the southeast corner of LaSalle and Madison Street in Cook County, Illinois, across the Madison Street from the One North LaSalle Building. The building sits on a site of a former Roanoke building (once known as Major Block 2) that once served as a National Weather Service Weather Forecast official climate site and replaced Major Block 1 after the Great Chicago Fire. The current building has incorporated the frontage of other buildings east of the original site of Major Block 1. The building was listed on the National Register of Historic Places (under the name Lumber Exchange Building and Tower Addition) on December 6, 2007, and named a Chicago Landmark on December 12, 2007. It incorporates the lands of the former DeSoto Building and former Farwell Hall. The building was renovated to become the world's largest Residence Inn in 2015.

10 South LaSalle (formerly Chemical Plaza, Manufacturers Hanover Plaza, and Chase Plaza) is a 502 ft (153 m) tall skyscraper in the LaSalle Street financial district of Chicago, Illinois. It was completed in 1989 and has 37 floors, and is tied with One Superior Place for the 87th tallest building in the city. The building is owned by The Feil Organization, which purchased it from MetLife in 2002 for $139.4 million.