Stylistic references of the AT&T Building on Galinsky.com

City Review article about changes made when the building became the Sony Building

Facts and a history of the bridge on NYCroads

David McCullough's classic account of the bridge construction: The Great Bridge, and the Ken Burns documentary based on the book: Brooklyn Bridge

The history of con men who sold the Brooklyn Bridge numerous times

New Yorker article about engineering flaws in the building secretly repaired in 1978: The Fifty-Nine-Story Crisis

Citicorp Center in The Midtown Book at the City Review

The Station at Citigroup Center, a fabulous miniature railway on display during the holidays

A description of Citigroup Center on greatgridlock.net

Great Buildings Online entry for Chrysler Building

Emily Zimmerman's essay Building the Chrysler Building

Another paper model of the Chrysler Building at Paper Toys.com

Higher: A Historic Race to the Sky and the Making of a City, by Neil Bascomb, published by Doubleday (2003)

The Chrysler Building: Creating a New York Icon Day by Day, by D. Stravitz, published by Princeton Architectural Press (2002)

Central Park 2000 description of Cleopatra's Needle

New York Parks historical marker for the obelisk

Nova Online's World of Obelisks

Walden Models features a free download of the matching Cleopatra's Needle obelisk now located in London

The New York Obelisk, by Martina D'Alton, published by Metropolitan Museum of Art (1993)

The official site of the Empire State Building

Emporis entry for Empire State Building

Great Buildings Online entry for Empire State Building

Lewis Hine photographs of the building construction: at Columbia and NY Public Library

NPR program about the history of the tower

Empire State Building: The Making of a Landmark, by John Tauranac, published by St. Martin's (1997)

Building the Empire State, by Carol Willis, published by W.W. Norton (2007)

Great Buildings Online entry for Flatiron Building

"The Flatiron Building at 100" on Flatironmag.com

Library of Congress film of a windy day at the Flatiron Building and the possible origin of the phrase "23 Skidoo"

The Flatiron, by Alice Alexiou, published by Thomas Dunne Books (2010)

General Grant National Memorial is run by the National Park Service

The Grant Monument Association has plans for its restoration

Groucho Marx popularized the riddle "Who's buried in Grant's Tomb?" on the quiz show "You Bet Your Life".

Information on the official Metropolitan Transit Authority website

Everything about rapid transit is on nycsubway.org

An animated map showing the growing web of subway lines

Casa Lever, a restaurant in the first floor of the building

The building is also the patron to rotating exhibits in the Lever House Art Collection

Skidmore, Owings & Merrill info about the project

Lever House in The Midtown Book at the City Review

Lipstick Building stats on Emporis

Bernard Madoff's investment firm was once located in the Lipstick Building

Some critics think the 1986 building to be one of the least attractive in New York

Times Square Alliance tells the history of New Years Eve at the Square

Antique postcard views of One Times Square

James Lilek's history of Times Square buildings and advertising

Short description of the Seagram Building on Galinsky.com

The famous Four Seasons restaurant, located on the first floor of the building

Arch Daily Classics: the Seagram Building

The fascinating story of how the Mark Rothko murals commissioned for the Seagram Building ended up at London's Tate Modern museum

The Seagram Building: Building Blocks Series, photographs by Ezra Stoller, published by Princeton Architectural Press (1999)

Washington Square Arch in paintings and photographs on NY Architecture Images

The fight to 'Save the Square' from a proposed roadway in the 1950s

A history of Washington Square Park

Wikipedia entry about the social history of Washington Square

History of the building from the Cass Gilbert Society

Description of the ornate lobby which is no longer open to the public

Curbed NY visits the observation deck

More photos of lobby details and other secrets of the building on Scouting NY

Construction of the building and photos of daredevil workmen

The Skyscraper and the City: The Woolworth Building and the Making of Modern New York , by Gail Fenske, published by University of Chicago Press (2008)

Paper model of the World Trade Center available from Fiddlers Green

A Japanese model of the WTC in 1:3000 scale from Paper Craft Maker

Joe Cangero's model of the WTC on cardmodelers.org

Andrew McCauley's model of the WTC

City in the Sky: The Rise and Fall of the World Trade Center, by James Glanz & Eric Lipton, published by Times Books (2003)