Step into history at the New Jersey State House in Trenton, Mercer County, the third-oldest state house in continuous legislative use across the nation. Originally constructed in 1792 by architect Jonathan Doane, this historic landmark offers an insightful look into state government. Unlike most state capitols built on park-like campuses to resemble the U.S.
Capitol, New Jersey's seat of power is uniquely integrated into an urban setting along historic State Street. It houses the Senate and General Assembly chambers, the offices of the governor and lieutenant governor, and various executive agencies. During your visit, you will observe an architectural tapestry resulting from centuries of expansions and renovations.
Wander beneath the 145-foot cast iron dome covered in copper and gold leaf—restored in part through contributions by New Jersey school children—and admire the rotunda inscribed with the Latin phrase meaning 'Let justice be done though the heavens fall.' Highlights of the building include the governor's office reception room, legislative galleries, and historic wings reflecting Second Empire, Victorian, and American Renaissance styles. You can also view the neighboring State House Annex, connected via an interior pedestrian tunnel.
What to see at New Jersey State House
- 145-foot cast iron dome gilded with 48,000 pieces of gold leaf
- Central rotunda featuring the Latin inscription 'Fiat justitia ruat caelum'
- Senate and Assembly chamber galleries housed in distinct architectural wings
- Governor's office reception room located in the historic core of the building
- State House Annex connected to the main structure by an interior pedestrian tunnel
Visiting tips
Make sure to head to the west side of the building near the Delaware River for the most scenic view of the structure and its unique additions.
How long: 1-2 hours · Best time: Weekdays by reservation
How to get there & what’s nearby
New Jersey State House is easy to reach on Trenton’s public transport. For where to stay, the weather and full itineraries, see our Trenton travel guide.
See the full Trenton travel guide for where to stay, the best time to visit and the top things to do.