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((Refimprove|date=February 2018))
((Infobox building
| name                = David Rittenhouse Laboratory
| image               = File:David Rittenhouse Laboratories.jpg
| image_size          = 
| image_alt           = <!-- or | alt = -->
| image_caption       = Exterior, ca. 2021
| map_type            = 
| map_alt             = 
| map_caption         = 
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| map_dot_label       = 
| map_dot_mark        = 
| relief              = 
| former_names        = Physical Science Building<ref name=observatory/>
| alternate_names     = 
| etymology           = 
| status              = 
| building_type       = Academic, research
| architectural_style = 
| classification      = 
| location            = [[University City, Philadelphia|University City]]
| address             = 209 South 33rd Street<br />[[Philadelphia]], [[Pennsylvania]]
| location_city       = 
| location_country    = 
| coordinates         = 
| altitude            = 
| current_tenants     = 
| namesake            = [[David Rittenhouse]]
| opened_date         = ((Start date|1954|09))<ref name=drl>((cite web |url=https://www.facilities.upenn.edu/maps/locations/david-rittenhouse-laboratory |title= David Rittenhouse Laboratory |publisher=[[Trustees of the University of Pennsylvania]] |access-date=February 13, 2018))</ref>
| renovation_date     = 1967<ref name=drl/>
| cost                = 
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| owner               = [[University of Pennsylvania]]
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| size                = 
| floor_count         = 6<ref name=drl/>
| floor_area          = ((convert|243484|sqft))<ref name=drl/>
| elevator_count      = 2<ref name=drl/>
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| architect           = James R. Edmonds, Jr.<ref name=drl/>
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| ren_architect       = Van Alan<ref name=drl/>
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))

The '''David Rittenhouse Laboratory''' (DRL) is an academic and research building at the [[University of Pennsylvania]] in [[Philadelphia]], [[Pennsylvania]], USA.  The building is named for [[David Rittenhouse]], a notable American astronomer and Penn professor of the 18th century and the president of the [[American Philosophical Society]].<ref name=drl/>

DRL is the home of two departments of the University of Pennsylvania: the Physics and Astronomy Department and the Mathematics Department.<ref name=drl/> Many other disciplines also hold classes in the building due to its ample lecture space. Because of this, the building is one of the most heavily used at the university.((citation needed|date=March 2013)) There is also an observatory on the roof that is accessible to astronomy students.<ref name=observatory>((cite web |url=http://www.archives.upenn.edu/faids/upb/upb1/upb1_9asfc.html |title=A Guide to the Flower and Cook Observatory Records, 1875 - 1987 |publisher=[[University of Pennsylvania]] Archives and Records Center |date=2001 |access-date=February 13, 2018))</ref>

The three-story portion of the building was constructed in 1954. The four-story addition was built in 1967.<ref name=drl/> Partial funding for the building came from the General Authority of Pennsylvania, which has a seal displayed on the first floor of the building. The architect for the original structure was James R. Edmonds, Jr. though the addition was designed by Van Alan.<ref name=drl/> There are stylistic differences between the two parts of the structure – for example, the windows of the 1967 section on the [[Walnut Street (Philadelphia)|Walnut Street]] facade are fashioned in the shape of the rounded-edge television monitors of the time.

In February 2019, a group of faculty, graduate students, post-doctoral fellows, and staff petitioned the administration to fix the recurring maintenance problems (e.g., water dripping from leaks in the ceilings, HVAC problems including poor temperature control, etc.) that occur in the building.<ref>((Cite web|url=https://www.thedp.com/article/2019/03/penn-petition-david-rittenhouse-laboratory-leak-facilities-maintenance|title=Grad students petition Penn to fix DRL's recurring water leaks and poor working conditions|last=Wang|first=Daniel|website=www.thedp.com|language=en-us|access-date=2019-03-01))</ref> In November 2023, The [[Daily Pennsylvanian]] reported that the DRL is included in part of a 600 million renovation planned over the next several years.

==References==
((reflist))

==External links==
* [https://www.math.upenn.edu/ Department of Mathematics, University of Pennsylvania]
* [http://www.physics.upenn.edu/ Department of Physics & Astronomy, University of Pennsylvania]

((Penn))

[[Category:University of Pennsylvania campus]]
[[Category:School buildings completed in 1954]]
[[Category:1954 establishments in Pennsylvania]]

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