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Pennsylvania Plaza (Penn Plaza) is the office, entertainment and hotel complex occupying and near the site of Pennsylvania Station, between 31st and 34th streets and Seventh and Eighth avenues in New York City.
It includes the current Madison Square Garden and its Theater, opened in 1968; the current below-ground Pennsylvania Station; and the One Pennsylvania Plaza and Two Pennsylvania Plaza office buildings. (Eleven Penn is the headquarters of the MSG Network and Two Penn is the headquarters of Cumulus Media New York and their radio stations WABC, WNSH and WPLJ, the Association for Computing Machinery and Information Builders.)
Other buildings around the complex use the Pennsylvania Plaza name as an alternate address, such as the 5 Penn Plaza office building on Eighth Avenue, to the northwest; the Pennsylvania Building at 225 West 34th Street (14 Penn Plaza), north of the station; and the Hotel Pennsylvania at 401 Seventh Avenue (15 Penn Plaza), east of the station. The numbering of the Penn Plaza addresses around the area does not follow a consistent pattern.
The Penn Plaza complex remains one of the most controversial in New York City history because it involved the destruction, beginning in 1963, of the original McKim, Mead and White-designed Penn Station (1910), a revered piece of New York architecture. Its replacements were what architects and civic purists regard as mediocre office and entertainment structures.
With the sports arena and railroad station at its hub and 34th Street retailers (including Macy's) nearing the complex, Pennsylvania Plaza remains one of the busier transportation, business and retailing neighborhoods in Manhattan.
- AMC Networks
- Compuware 
- Cosentini Associates
- McGraw-Hill 
- MSG Networks
- Information Builders
- Lyons, Richard D. (May 22, 1988). "How Builders Invent Vanity Addresses". The New York Times. Retrieved 2009-07-22.
- Collins, Glenn (October 28, 2003). "40 Years After Wreckage, Bits of Old Penn Station; Ghosts of a New York Marvel Survive". The New York Times. Retrieved 2009-07-22.
- "Compuware Around the World". Compuware. Archived from the original on 2010-01-04. Retrieved 2010-01-07.
- "New York". McGraw-Hill. Archived from the original on 2010-02-26. Retrieved 2010-03-11.
- 2 Pennsylvania Plaza - Prime Office Centers