Open Travel Guide
History of Connecticut

Connecticut History & Heritage Guide 2026

The history of Connecticut told through its places: sites worth the detour and the context they need.

Connecticut has 9+ historical sites covered in this guide, led by Mark Twain House & Museum, Harriet Beecher Stowe Center and Mystic Seaport Museum. Each entry below includes the practical details — what it costs, when to go, and how to plan around it.

Connecticut is New England's southernmost state — a compact, densely layered destination where Ivy League prestige meets colonial seafaring heritage, world-class pizza, casinos, and Long Island Sound beaches. From Yale's Gothic spires in New Haven to Mystic's tall ships, from Hartford's Mark Twain house to the gilded estates of Greenwich, Connecticut packs an extraordinary range of experiences into 5,543 square miles.

Historical timeline

Key moments that shaped Connecticut.

  1. 1

    Dutch explorer Adriaen Block sails up the Connecticut River — first European contact

    c. 1614
  2. 2

    Thomas Hooker leads a group of settlers from Massachusetts Bay Colony to found Hartford

    1636
  3. 3

    New Haven Colony established by English Puritans; later merges with Connecticut Colony (1665)

    1638
  4. 4

    Fundamental Orders of Connecticut drafted — considered the world's first written constitution

    1639
  5. 5

    Yale University founded in Saybrook, later moved to New Haven (1717)

    1701
  6. 6

    Connecticut ratifies Declaration of Independence; Griswold Inn in Essex established

    1776
  7. 7

    Connecticut becomes the 5th state to ratify the US Constitution

    1788
  8. 8

    Samuel Colt patents the revolver in Hartford; Colt Manufacturing Company transforms Hartford

    1835
  9. 9

    Harriet Beecher Stowe publishes Uncle Tom's Cabin, written while living in Connecticut

    1852
  10. 10

    Mark Twain builds his Nook Farm home in Hartford; writes The Adventures of Tom Sawyer here

    1874
  11. 11

    USS Nautilus, world's first nuclear submarine, launched at Groton's Electric Boat shipyard

    1954
  12. 12

    Mashantucket Pequot Tribal Nation gains federal recognition; Foxwoods opens (1986, expanded 1992)

    1986

Historical sites

Places where Connecticut's past comes alive.

Historic

Mark Twain House & Museum

Where: Hartford

Admission: Adults $24 USD, Seniors $22 USD, Children (6-16) $12 USD

Historic

Harriet Beecher Stowe Center

Where: Hartford

Admission: Adults $16 USD, Seniors/Students $14 USD, Children (5-12) $10 USD

Historic

Mystic Seaport Museum

Where: Mystic

Admission: Adults $29.95 USD, Children (4-17) $19.95 USD

Historic

Wadsworth Atheneum Museum of Art (founded 1842)

Where: Hartford

Admission: Adults $20 USD, Seniors/Students $15 USD

Historic

Old State House Hartford (1796)

Where: Hartford

Admission: Free

Historic

Gillette Castle State Park

Where: East Haddam

Admission: Castle tours $8 USD adults, $3 USD children; grounds free

Historic

Submarine Force Museum & USS Nautilus

Where: Groton

Admission: Free

Historic

Florence Griswold Museum

Where: Old Lyme

Admission: Adults $14 USD, Seniors $13 USD

Historic

Griswold Inn Essex (est. 1776)

Where: Essex

Admission: Restaurant and bar open to public; no admission fee for historic building tours