Palazzo Loredan Grand Canal Restoration

15th-century Venetian Gothic marble facade illuminated from canal sub-grade waterlines

LOCATIONVenice, Italy

COMPLETION2024

ARCHITECTSuperintendency of Cultural Heritage Venice

LIGHTING DESIGNERCO & Metis Lighting Heritage Unit

GROSS AREA1,200 m²

CEILING DATUM14.5 meters

Section 01 / Spatial Context

Architectural Framework

Standing directly on the Grand Canal, Palazzo Loredan is an iconic 15th-century Venetian Gothic palazzo built of porous Istrian marble, decorated with intricate quatrefoil tracery and slender multi-tiered loggias. The building is regularly exposed to saltwater flooding (Acqua Alta) and atmospheric humidity.

Section 02 / The Lighting Challenge

Drilling into the historic marble facade was strictly prohibited by the Venice Heritage Commission. In addition, fixtures had to endure complete saltwater submersion during high tides, while preventing upward glare from blinding gondoliers and water taxis navigating the dark canal.

Optical & Glare Compliance

Submersion ProtectionStandard Architectural IP67

IP68 (3m Depth)

Impact ResistanceDrive-over Canal Pavement

IK10 (20 Joules)

Light Trespass AngleVenetian UNESCO Night Conservation

< 2°

Color TemperatureHistoric Istrian Stone Standard

2700K Warm Amber

Light Field Distribution10° Beam

Sub-grade 10° x 40° elliptical graze with internal 15° mechanical tilt aimed back at the stone face.

Zero light trespass into adjacent canal waterways; Istrian stone relief magnified by 400%.

Section 03 / Luminous Strategy

The Concept of Luminous Absence

The lighting team deployed sub-grade marine-grade fixtures directly into the underwater quay foundation. With internal 15° mechanical tilt and elliptical optical distribution, the fixtures graze upward along the Istrian stone pilasters, picking out the relief of the Gothic carvings while keeping the canal water surface dark and undisturbed.

Optical Methodology:

Installed TERRA G-80 IP68 inground floodlights with 10° x 40° elliptical graze optics and internal honeycomb glare shields. The elliptical beam concentrates photon energy vertically along the columns without lateral spill into canal waters.

Realized Spatial Result:

The historic palazzo appears weightless, hovering over the dark canal waters like a luminous Gothic lace veil, completely compliant with UNESCO World Heritage nightscape guidelines.

Section 04 / Architectural Imagery

Spatial Documentation

Photographs demonstrating vertical boundary illumination, texture relief, and source concealment.

Waterfront Elevation from Grand Canal

Nighttime vista from Grand Canal: TERRA G-80 fixtures graze the Istrian stone colonnade from the water plinth.

Section 05 / Engineering Implementation

Marine-Grade Submersible Engineering for Venice Waters

Housings were CNC-machined from forged 316L marine stainless steel with double fluoroelastomer O-ring seals and an internal desiccant breathing valve to prevent condensation vacuum during tidal cycles.

Technical Schematic Reference