The Philadelphia Mint was created from the need to establish a national identity and the needs of commerce in the United States. This led the Founding Fathers of the United States to make an establishment of a continental national mint a main priority after the ratification of the Constitution of the United States.
The Coinage Act of 1792 was entered into law on April 2. It proclaimed the creation of the United States Mint. Philadelphia at that time was the nation's capital; therefore the first mint facility was built there. The Mint Act also instituted a decimal system based on a dollar unit; specified weights, metallic composition and fineness; and required each United States coin feature "an impression emblematic of liberty".
First Building (1792–1833) 
David Rittenhouse, an American scientist, was appointed the first director of the mint by President George Washington. Two lots were purchased by Rittenhouse on July 18, 1792, at Seventh Street and 631 Filbert Street in Philadelphia for $4,266.67. The next day demolition of an abandoned whiskey distillery on the property began. Foundation work began on July 31, and by September 7, the first building was ready for installation of the smelting furnace. The smelt house was the first public building erected by the United States government. A three-story brick structure facing Seventh Street was constructed a few months later. Being the tallest and most visible structure of the mint the words "Ye Olde Mint" were painted on. Measuring nearly 37 feet (11 m) wide on the street, it only extended back 33 feet (10 m). The gold and silver for the mint was contained in basement vaults. The first floor housed deposit and weighing rooms, along with the press room, where striking coins took place. Mint official offices were on the second floor, and the assay office was located on the third floor.
Between the smelt house and "Ye Olde Mint" a mill house was built. Horses in the basement turned a rolling mill located on the first floor.
In January 1816 the smelt and mill houses were destroyed by a fire. The smelt house was never repaired and all smelting was done elsewhere. The mill house, which was completely destroyed, was soon replaced with a large brick building. It included a new steam engine in the basement to power the machinery.
Until 1833, these three buildings provided America with spendable hard currency. Operations moved to the second Philadelphia mint in 1833 and the land housing the first mint was sold. In the late 19th or early 20th century, the property was sold to Frank Stewart, who approached the city asking them to preserve or relocate the historic buildings. With no governmental help "Ye Olde Mint" was demolished between 1907 and 1911. A small plaque now is the only thing memorializing the spot.
Second Building (1833–1901) 
On July 4, 1829, a cornerstone was laid at the intersection of Chestnut and Juniper. It was designed by William Strickland. The second Philadelphia Mint, the "Grecian Temple", was constructed of white marble with classic Greek style columns on front and back. Measuring 150 feet (46 m) wide in front by 204 feet (62 m) deep, it was a huge improvement over the first facility, in space as well as image. Opening in January 1833, its production was constrained by the outdated machinery salvaged from "Ye Olde Mint". Franklin Peale was sent to Europe to study advanced coin making technologies which were brought back and implemented, increasing productivity and quality.
Sold in 1902, the second mint was quickly demolished. The cornerstone buried in 1833 was unearthed and contained a candy jar with a petrified cork stoppering it. Inside the jar were three coins, a couple of newspapers, and a scroll with information on the first mint and the creation of the second.
Third Building (1901–1969) 
The third Philadelphia Mint was built at 1700 Spring Garden Street and opened in 1901. It was designed by James Knox Taylor. It was a block from the United States Smelting Company was at Broad and Spring Garden Streets. In one year alone the mint produced 501,000,000 coins (5/7 of the U.S. currency minted) as well as 90,000,000 coins for foreign countries.
A massive structure nearly a full city block, it was an instant landmark. Characterized by a Roman temple facade, visitors enjoyed seven themed glass mosaics designed by Louis C. Tiffany in a gold-backed vaulted ceiling. The mosaics depicted ancient Roman coin making methods. This mint still stands intact with much of the interior as well. It was acquired by the Community College of Philadelphia in 1973.
Fourth and Current Building (1969–present) 
A mere two blocks from the site of "Ye Olde Mint", the fourth and current Philadelphia Mint opened its doors in 1969. It was designed by Philadelphia architect Vincent G. Kling who would also help design Five Penn Center, Centre Square and the Annenberg Center for the Performing Arts.
It was the world's largest mint when it was built and held that distinction as of January 2009.
The Philadelphia Mint can produce up to one million coins in thirty minutes. It took three years for the original mint to produce that many. The mint also produces medals and awards for military, governmental and civil services. Engraving of all dies and strikers only occurs here. Uncirculated coins minted here have the "P" mint mark, while circulated coins from before 1980 carried no mint mark except the Jefferson nickels minted from 1942–1945 and the 1979 Susan B. Anthony dollar coins. Since 1980, all coins minted there have the "P" mint mark except cents.
Tours can be taken where all stages of minting are explained, along with displays of past equipment. This takes place via an enclosed catwalk above the minting facility itself. Various video stations are placed along the tour route, where visitors can push buttons to watch videos about various stages of the minting process. Most of those videos were narrated by the late Baseball Hall of Fame announcer for the Philadelphia Phillies (and voice of NFL Films), Harry Kalas.
On August 19, 1858, two well-dressed thieves on a tour of the mint used a counterfeit key to open a display case. They made off with $265.00 in gold pieces, but due to the rarity of the coins the men were quickly apprehended while trying to spend them in local shops.
In 1893, Henry S. Cochran, a weighing clerk, was found to have embezzled $134,000 in gold bars from the mint vault over a period of 8–10 years. $107,000 was recovered from his home and from a cache in the ventilation system inside the mint itself.
Approximately 500,000 Double Eagle coins were minted in 1933 but none were ever legally released. One coin surfaced in 1996 and, after a legal battle, was sold at auction for $7 million in 2002. The seller and the government split the proceeds of the auction, with the provision that any further 1933 Double Eagles would be seized and not auctioned. In 2003, a Philadelphia woman named Joan Switt Langbord found ten 1933 Double Eagles in a safety deposit box that once belonged to her parents; when she took them to be appraised, they were seized by the United States Treasury as stolen property. Investigators claimed that Langbord's father, Israel Switt, conspired with a clerk inside the mint to steal the coins. He had been investigated previously for the crime, leading to the confiscation of several gold pieces, but the statute of limitations had prevented him from being prosecuted. Langbord sued to have the coins returned to her, but in July 2011 a federal jury ruled that the stolen coins were property of the U.S. government.
See also 
- Third Philadelphia Mint (1901-1969) - workshopoftheworld.com - Retrieved August 31, 2008
- Vincent Kling - Ed Bacon Foundation - Retrieved August 31, 2008
- Radio Hall of Fame entry for Kalas Retrieved 2012-03-15
- "Daring Robbery at the United States Mint". The New York Times. August 19, 1858.
- "Another Report of the 1858 U.S. Mint Cabinet Robbery". Numismatic Bibliomania Society. October 5, 2008.
- "Stolen By a Trusted Clerk". The New York Times. September 17, 1893.
- "United States Mint Recovers 10 Famed Double Eagles". United States Mint. August 11, 2005.
- "Family, U.S. claim rare 1933 'double eagle' gold coins".
- "Rare Coins ‘Stolen Property’ According To Philadelphia Jury".
- "US Mint officer admits taking $2.4M worth of coins".
Media related to Philadelphia Mint at Wikimedia Commons