Published: April 23, 2024

Perched majestically on Munjoy Hill in Portland, Maine, the Portland Observatory stands as a testament to maritime history and ingenuity. Built in 1807 by Captain Lemuel Moody, this octagonal tower served as a crucial communication station for Portland’s bustling harbor, offering a competitive edge to ship owners who subscribed to Moody’s services.

At the time of its construction, ships entering the harbor were invisible from the docks until they rounded Spring Point Ledge. Moody’s powerful telescope, positioned at the tower’s pinnacle, could identify vessels up to 30 miles away. Subscribing merchants received alerts by hoisted signal flags, enhancing the efficiency of Portland Harbor.

The Observatory remained a working marine signal tower under Moody’s family until 1923, when advances in communication technology rendered it obsolete. Falling into disrepair, the tower was donated to the City of Portland and underwent restoration, opening to tourists in 1939.

In 1984, Greater Portland Landmarks assumed management, opening the tower for regular tours. However, in the 1990s, the tower faced serious moisture damage and an infestation of powder-post beetles. Through collaborative efforts, including the City of Portland and concerned citizens, the Observatory was restored once again and reopened in 2000.

Today, the Portland Observatory stands as the only remaining historic maritime signal station in the United States. Designated as a National Historic Landmark and a National Historic Civil Engineering Landmark in 2006, it offers visitors a glimpse into Portland’s rich maritime history.