Long before everyone checked the time by glancing at their cellphones, many decorative clocks were installed to help New Yorkers keep track of time. While some were built as art pieces in more recent years, other clocks have often been recognized as essential pieces of “street furniture,” along with lamp posts, sign posts, and benches.

They also have been utilized in cities all over in order to maintain and enhance the quaintness of neighborhoods. In this piece, we highlight a few of New York’s most iconic time pieces you may or may not have noticed. Of course, this is only a sampling of the various fixtures you can find across the five boroughs. If you know of any others, leave us a comment below:

1. Barthman Jeweler Sidewalk Clock

Located along the intersection of Maiden Lane and Broadway, outside the old location of Barthman Jewelers in Lower Manhattan, a clock occupies a small break in the sidewalk. It’s been located in that spot since 1896, originally installed by Barthman and one of his employees, Frank Homm.

The clock is an ode to the district’s prominence in the jewelry trade and was created to lure customers into the Barthman store over other jewelers. The only time the clock stopped working was during the Depression of the 1930s, and temporarily after Hurricane Sandy. The signature time piece was maintained from a mechanical room that is only accessible by going underground. Barthman Jewelers has since moved a few doors down from their original location, and the clock has mysteriously disappeared after passerby noted that it has been in disrepair. Read more about its history here.

2. Union Square’s Digital Clock

The rapidly ticking of numbers in Union Square is a mystery to many. Even lifelong New Yorkers might not know what they really mean, although some have suggested that they could represent the national debt number or the number of rainforest acres being destroyed. Both of these guesses, however, are incorrect — the numbers are actually a digital countdown of the hours within a given day.

The digital clock was installed over 15 years ago by Kristin Jones and Andrew Ginzel in partnership with the Public Art Fund for The Related Companies. The numbers count the 24 hours of the day, while also showing the remaining hours in the day.For example, in this photograph, the time is 8:21 (or 20:21 in military time), with an additional 26.5 seconds. Reading from the right side, there are 3 hours, 38 minutes, and 33.4 seconds left in the day. The center digit counts hundredths of a second. According to the Public Art Fund website, the digital clock is “meant to convey the energy, exhilaration and ultimate flux that is the essence of New York City.” Read more about the Union Square clock here.

3/4. The World’s Largest Tiffany Clock + Information Booth Clock

Grand Central Terminal is home to the world’s largest Tiffany Clock, operating at 13 feet in diameter. Originally installed in 1914, the clock continues to overlook 42nd Street to this day. It was designed by French sculptor Jules-Felix Coutan, and is surrounded by sculptures of Hercules and Mercury that were carved by the John Donnelly Company of Minerva.

Since its installation, the clock has undergone serious repairs. Its most serious restoration took place in 1992 by Rohlf’s Studio, a process which took twelve years to complete. In addition to restoring the original clock, the Studio was required to replicate missing parts and reinstall the clock piece by piece. With its stunning and elaborate exterior, it’s difficult to imagine what it may look like from the inside. Luckily, these photos give us a glance inside.

Additionally, inside Grand Central Terminal sits one of New York City’s most recognizable clocks, which sits atop the central information booth. There’s a common myth that it may be worth more than $10 million because of its four milk-glass (or opaline glass) faces. Regardless of its real worth, it’s certainly one of the city’s most iconic clocks. For more information about New York City’s beloved transit hub, make sure to join us for an upcoming tour:

Tour of the Secrets of Grand Central Terminal

5. The Sun Clock

Located at 280 Broadway, The Sun newspaper’s former headquarters features a large clock and thermometer projecting from the facade of the building. The clock is inscribed with the paper’s name and motto: “It Shines for All.”

For those who don’t know, The Sun was a New York newspaper that was published from 1833 until 1950. It was the conservative rival to The New York Times and the New York Herald Tribune. Costing just one penny to purchase, The Sun was the first newspaper to report on crime and stories of ordinary citizens, making it a popular newspaper choice for the working class. Today, its former headquarter serves as the central offices for the New York City Department of Buildings. Originally, however, it housed the A.T. Stewart dry goods emporium, regarded as the first department store in New York. The Sun building is just one example of the many former locations of newspaper headquarters in New York City. It’s also full of many interesting and historical secrets, which you can read here.

6. Sidewalk Clock in the Flatiron District

Located directly in front of New York City’s beloved Eataly, a decorative cast-iron sidewalk clock is situated next to a subway entrance, a newsstand, a telephone booth, a mailbox, lamppost, and numerous planters. The clock was manufactured by Hecla Iron works and is composed of an ornamented base and an Ionic column. Roman numerals on its face are also framed by wreaths of oak leaves and crowned by a cartouche.

Many people easily walk past this clock on a daily basis, but it’s been a fixture in the neighborhood since 1909, when it replaced an earlier clock that had accompanied the elegant Fifth Avenue Hotel. In an effort to preserve the historic importance and artisanship of cast-iron clocks, the city designated the clock an individual landmark in 1981. It’s one of seven sidewalk clocks designated as such. Three other ones are in Manhattan – in front of the Sherry Netherland Hotel, at 1501 Third Avenue and at 522 Fifth Avenue. There are also two in Queens, one at 16-11 Jamaica Avenue, thought to have been installed by Busch’s Jewelers and a Wagners Jewelers Clock at 30-78 Steinway Street. Lastly, there’s one in Greenpoint, the Bomelsteins Jewelers clock, at 753 Manhattan Avenue.

7. The Clock Tower Building

Located at the top of the 124-condominiums are four giant clocks, designating the residential building to be named “The Clock Tower.” Located in DUMBO, the tower is known for its iconic architectural qualities and the sweeping, unobstructed views it provides for its residents.

The clock tower was originally built in 1914 and received a total conversion in 1998. One of its most notable features is the penthouse at the top of the building, with transparent four 14-foot windowed working clocks surrounding the living area. The penthouse closed for $15 million last year, which earned itself the title of being the most expensive condominium sale ever in the borough.

8. Brooklyn Williamsburgh Savings Tower

Built in 1927, the Williamsburgh Savings Tower is one of Brooklyn’s architectural icons due to its clocks located at the top of the building. The structure itself is among the tallest four-sided clock towers in the world, with each of the clock faces measuring 17 feet in diameter. At the time of their installation, they were the largest clock faces in the world, and the building was the tallest building in the borough — titles that have now been surpassed.

Originally built as the new headquarters for the Williamsburgh Savings Bank, the building has since been converted to  luxury condominium apartments. It was declared a New York City landmark in 1977, and its clocks continue to make it one of the most recognizable towers in Brooklyn.

9. Tiffany & Co. Atlas Clock

Another example of a major player in the golden age of Manhattan’s jewelry, Tiffany & Co. lured customers in with its decorative entrances. In 1853, the company built an impressive new building at 550 Broadway embellished with a beautiful clock.

To create the piece, Charles Tiffany commissioned dear friend and renowned sculpter, Henry Frederick Metzler. Standing at nine feet in height and four feet in diameter, the clock is held up by Atlas, the Greek Titan God and known as the bearer of the heavens. Over time, as Tiffany & Co. moved flagship locations, it transported the clock with them. Finally in 1940, Tiffany & Co. moved to their famous location on Fifth Avenue, and the sculptural clock continues to reside there today.

10. Delacorte Clock at Central Park Zoo

Located above the arcade between the Wildlife Center and the Children’s Zoo, Central Park Zoo’s iconic timepiece known as the Delacorte Clock has established itself as one of the most beloved monuments within the green space. The clock is dedicated to George T. Delacorte, the publisher and philanthropist who gifted the fixture to the park in 1965.

Everyday between 8am and 6pm, the digitally programmed clock plays one of thirty-two nursery rhyme tunes on the hour. It also features sculpted animals, including a penguin, kangaroo, bear, elephant, goat, and hippo that parade around the clock. Additionally, two sculpted monkeys with mallets strike the bell on the hour. The full list of songs, which can be seen here, are divided into four seasonal categories; Christmas songs, for instance, are programmed to play from December 1-25. For more fun facts and secrets of the Central Park Zoo, click here.

11. Cafe Select Clock

If you’ve ever dined at Cafe Select, the casual Swiss spot located on 212 Lafayette Street, you’ve definitely also noticed its huge Rolex clock. The cozy eatery boasts a 20th century “European rail-station” vibe, so naturally the time piece is sourced from a French train station. Patrons certainly come for the food, but they return time and time again to enjoy the ambiance, decorated with Christmas lights and Swiss posters.

BONUS: Shinola Sidewall Double Sided Clock

Although this is one of the newer clocks we’ve spotted around New York City, we appreciated the design and thought it was worth special mention. You can find the double sided, personalized time piece mounted on the outside of Shinola, a Detroit-based watch and accessories store located within the Empire Store’s waterfront shopping complex in DUMBO. Shinola also has another location in Tribeca.

Shinola has all of its clocks custom made by Electric Time Company, a legendary company in Medfield, Massachusetts. Originally founded in 1928, Electric Time Company is currently a manufacturer of tower and street clocks marketed worldwide. Its products can be found anywhere from New York City to the Magic Kingdom in Disney World, with each clock designed and installed on the premises of the location. They’re made to order and usually take up to three months to complete.

Next, check out Inside the Clocktower of the Jefferson Market Library, a Former Courthouse and Prison and Inside the World’s Largest Tiffany Clock at Grand Central Terminal.