The Sunken Chamber Baltimore Caisson Engineering Blueprint charts the strange architecture of a lighthouse built from the seabed up — a pneumatic iron cylinder sunk into Chesapeake mud, its working chamber pressurized so men could dig beneath the Bay while the tower rose above them. The draftsman's lines trace not just a structure but a descent, every rivet and bulkhead drawn with the gravity of someone who knew the weight of water overhead.

About the Source

Bella Frye sources lighthouse drawings from American maritime archives — the U.S. Coast Guard, National Archives, and historical societies along the Atlantic, Pacific, and Great Lakes coasts. These are engineering documents, not blueprints. The aged paper tone, the hand-drafted weight of the linework, and the original notations are preserved in the print.

Materials & Finish

Printed to order in our Pacific Northwest studio on premium 380gsm cotton canvas with archival pigment inks. Hand-finished and framed in our signature ornate frame with verdigris corner detail, available in three finishes:

• Ebony — deep black with carved ornate detailing; dramatic against light walls
• Verdigris — aged copper-green with antique patina; the signature Bella Frye look
• Bourbon — warm walnut tone with ornate relief; rich and historically grounded

Stretched canvas (frameless gallery wrap) is available for those who prefer a frameless presentation.

Where It Belongs

Coastal homes, libraries, studies, captain's rooms, maritime offices, and any space where American maritime history earns wall presence. Pairs naturally with vintage nautical charts, ship drawings, and other documents from the Bella Frye Maritime & Light Stations collection.

• Premium 380gsm cotton canvas, archival pigment inks
• Three frame finishes: Ebony, Verdigris, Bourbon
• Stretched canvas option available
• Hand-finished in our Pacific Northwest studio
• Arrives ready to hang
• Free shipping on every order, ships next business day