SKYDB
Data backbone

Other information
besides just buildings.

SKYDB is built from regions, companies, photos and the dictionary that ties them together. Pick a thread to pull.

Explore database →
RegionsBrowse every region on file→
CompaniesArchitects, developers, engineers→
DefinitionsTerms and concepts explained→
New toolHeatmap modeSee structure density visualised across cities - beta.
Try heatmap →
Buildings, everywhere.

Unlimited ways
to discover.

Browse the top 1000 tallest, search for any building by name or attribute, or explore city-by-city statistics.

Explore buildings →
Search formFind content with ease.→
Top 1000 SkyscrapersUpdated as new towers complete→
Biggest CitiesView city-related statistics→
Biggest CountriesNational rankings + records→
RegionsBrowse buildings by region→
CompaniesArchitects, developers, engineers→
For SKYDB Premium usersChannelsChannels organize buildings across cities and countries by height or theme. Their building lists are available with SKYDB Premium.
Browse channels →
SKYDB Community

Where accuracy
comes from.

We are what makes SKYDB stand apart. Editors who care about buildings and care more about getting them right. Same standards, same care.

Community →
EditorsA community which matters→
MembershipsElevate your possibilities→
How to submitWhat we need and how to send it→
Add buildingLaunch the object tool→
Upload photosSubmit missing images→
My contentEverything you added and edited→
SpotlightFeatured PersonalityMarshall Gerometta is "the brain" when it comes to heights. As a veteran in the field, he also maintains the world's official list of the tallest skyscrapers.
Explore his work →
Since 30 years

The source
for tall buildings

SKYDB is creating the world's most comprehensive and deepest database of tall buildings. Used by professionals, maintained by experts.

Who we are →
Who we areExperts in the field→
Pricing and ServicesGet access to paid options.→
DefinitionsHow we measure and verify→
Knowledge BaseArticles + tutorials→
Get the NewsLatest announcements→
ContactReach out to the team.→
Featured activitySKYDB AwardsThe best skyscrapers of the world. Selected every year by SKYDB and its community members.
Visit the page →
Panorama of Philadelphia File 772-395-511

Philadelphia, PA city

structure #936461466building

Walnut Square Apartments

existing 48.8 m 13 floors 1904

Full map Join SKYDB
Location of Walnut Square Apartments
Height Rankings

Object dataJoin to edit

Main Roof Height48.8 m
Floors13
Completion1904
Structural Formhigh-rise building
Main Usageresidential
Status existing
Architectural Stylesecond empire
Address201 South 13th Street
Smart Address201–235 South 13th Street
Smart Address1222–1232 Walnut Street
CityPhiladelphia
CountryUnited States
Source: SKYDB | As of: 2026-09-18

Location

Full MapGoogle MapsBing Maps

Rating

The rating reflects architectural quality and visual impact as judged by SKYDB users, and feeds into how this building is ranked across the site.

Files Join to upload

  1. Photo 212-180-785
    Photo 212-180-785
    John W. Cahill
  2. Photo 577-415-144
    Photo 577-415-144
    John W. Cahill
  3. Photo 746-704-970
    Photo 746-704-970
    Nate Lindsey
  4. Photo 212-487-336
    Photo 212-487-336
    John W. Cahill
  5. Photo 933-980-848
    Photo 933-980-848
    John W. Cahill
  6. Photo 383-493-176
    Photo 383-493-176
    John W. Cahill
  7. Photo 124-274-705
    Photo 124-274-705
    John W. Cahill
  8. Photo 931-922-183
    Photo 931-922-183
    Chris Patriarca
  9. Photo 327-307-019
    Photo 327-307-019
    John W. Cahill
  10. Photo 443-254-862
    Photo 443-254-862
    John W. Cahill
  11. Photo 168-199-867
    Photo 168-199-867
    John W. Cahill
  12. Photo 218-372-720
    Photo 218-372-720
    John W. Cahill