| Gothic Revival Ecclesiastical Panel | Approximately 1840–1900 | Churches, chapels, and revival-style domestic architecture in Europe, North America, and other regions influenced by European design. | Pointed arches, quatrefoils, tracery patterns, heraldic details, saints, biblical scenes, and rich jewel-like colors. | Lead came may show age-related oxidation and uneven hand finishing. Hand-painted facial details, historically appropriate glass colors, and old reinforcing methods can support an earlier date. A documented removal from a building is especially useful. | Inspect for bowing, cracked glass, loose cement, failed solder joints, corrosion of lead cames, and repairs around painted faces. Painted areas should not be excessively worn or recently overpainted. | Confirm whether the panel is a complete original composition or a later reassembly. Check dimensions, provenance, and whether architectural alterations explain its removal. |
| Art Nouveau Floral Panel | Approximately 1890–1914 | Urban residences, cafés, entrances, and decorative interiors across Europe, North America, and parts of Australia. | Whiplash curves, flowing stems, irises, lilies, poppies, peacock motifs, asymmetry, and opalescent or softly blended glass. | Original examples often combine varied textures, streaked glass, and hand-shaped lead lines. Period soldering is generally irregular rather than perfectly uniform. A consistent relationship between design, glass texture, and construction is important. | Look for fractures at tight curves, weakened perimeter leads, replacement pieces that differ in texture, and clouding or surface deposits. Opalescent glass should be assessed under natural and angled light. | Compare the construction quality with the claimed period. Newer decorative panels can imitate the style, so tool marks, solder aging, glass texture, and provenance should be evaluated together. |
| Art Deco Geometric Panel | Approximately 1919–1939 | Apartment buildings, theaters, commercial interiors, and private residences in Europe and North America. | Stepped forms, sunbursts, fans, strong symmetry, stylized flowers, clear geometric borders, and combinations of amber, black, blue, green, and opaque glass. | Period panels commonly use machine-rolled or textured glass together with hand-cut leaded construction. Consistent geometry does not by itself prove modern manufacture; solder profile, weathering, edge treatment, and documented architectural use are also relevant. | Check long straight leads for bowing, stress cracks at corners, brittle cement, and separation at joints. Large geometric sections may conceal replacement glass if viewed only from a distance. | Verify whether the panel was made for a building, furniture, lighting fixture, or later decorative installation. Original framing and hardware can help establish context. |
| Heraldic and Armorial Panel | Approximately 1700–1900, with later historicist examples | Manor houses, civic buildings, religious settings, and institutional interiors in Europe and regions with European heraldic traditions. | Coats of arms, shields, crests, mottos, crowns, supporters, and precise symbolic color arrangements. | Authenticity depends heavily on correct heraldic design and historical context. Painted silver stain, enamel details, glass thickness, and period-style lead work should be examined. An identifiable family, institution, or building can make provenance verifiable. | Inspect painted lettering, fine lines, and enamel for losses or abrasion. Check for mismatched shield sections, replacement borders, unstable paint, and assembled fragments from different panels. | Research the depicted arms independently. A visually convincing panel with historically incorrect heraldry may be decorative rather than genuinely historical. |
| Painted Figurative Panel | Approximately 1750–1900 | Religious, civic, and residential interiors in Europe and colonial-era settings influenced by European glass painting. | Human figures, architectural backgrounds, drapery, landscape scenes, grisaille shading, silver stain, and kiln-fired enamel painting. | Traditional painted glass often shows brushwork integrated with the glass surface rather than a flat modern coating. Firing characteristics, controlled shading, historically suitable pigments, and lead construction should agree with the claimed date. | Use raking light to identify paint loss, scratches, flaking, and later surface coatings. Examine hairline cracks through painted sections and signs of heat damage or aggressive cleaning. | Request close photographs of painted areas from both sides. Avoid relying solely on color or apparent patina, since artificial aging and restoration can alter the visual impression. |
| Mosaic or Millefiori Panel | Approximately 1850–1914 | Decorative interiors, doors, screens, and domestic settings in Europe and North America. | Small colored glass pieces, floral or star-like cane patterns, repeated tesserae, dense ornamental borders, and richly varied surface texture. | True millefiori elements contain patterned glass canes visible within the material, while painted imitations do not. Original assembly methods, aged setting material, and coherent wear across the panel help distinguish an older panel from a recent reproduction. | Check for loose tesserae, open joints, missing pieces, unstable backing, moisture damage, and incompatible replacement glass. Small elements can be difficult and costly to conserve. | Determine whether the panel is leaded, cemented, or mounted on a later backing. Ask whether the design is complete and whether any pieces have been reset. |
| Beveled Glass Door or Transom Panel | Approximately 1880–1930 | Residential entrances, interior doors, transoms, and commercial façades in Europe, North America, and other urban building traditions. | Clear or lightly tinted glass, polished bevels, geometric borders, diamonds, oval centers, and faceted light effects. | Older bevels may show subtle variation in width and polish, but variation alone is not conclusive. Original lead came, corner construction, old glazing putty, and surviving hinges or frame evidence can support an early date. | Inspect bevel edges for chips, star cracks, and impact damage. Check heavy panels for sagging, failed joints, loose perimeter came, and stress where the glass meets the frame. | Measure accurately and establish whether the panel is intended for a standard door, transom, or custom opening. Structural safety matters when the panel will be reinstalled. |
| Landscape and Scenic Panel | Approximately 1870–1930 | Domestic interiors, memorial settings, public buildings, and decorative windows in Europe and North America. | Rivers, trees, mountains, gardens, cottages, atmospheric skies, layered glass, and painted or acid-etched details. | Authentic period scenes usually show deliberate variation in glass texture and hand-applied details. The scene should be technically consistent with leaded construction, kiln-fired paint, or other methods appropriate to the claimed period. | Check large sky or water pieces for cracks, thermal stress, and replacement sections. Look for fading or loss of painted details, bowing, and water-related corrosion along the lower edge. | Establish whether the panel was made as a window, memorial, cabinet insert, or later decorative object. Original framing can reveal its intended use. |
| Memorial or Commemorative Panel | Approximately 1850–1930 | Religious buildings, cemeteries, civic interiors, schools, and private memorial settings worldwide. | Dedication texts, dates, names, symbols of remembrance, floral borders, angels, crosses, flags, or portrait-like imagery. | Inscribed dates and names provide research leads but are not proof by themselves. Verify the person, event, or institution through independent historical records and compare lettering, iconography, and materials with the claimed period. | Examine lettering for repainting, missing enamel, abrasion, and cracks caused by stress near borders. Check whether the dedication area is original to the surrounding composition. | Prioritize provenance and documentary research. Memorial panels may have been moved, repaired, or reconstructed, so the history of ownership and installation is essential. |
| Lead Came Cabinet or Furniture Panel | Approximately 1880–1930 | Cabinet doors, bookcases, screens, lamps, sideboards, and interior furnishings in Europe and North America. | Small-scale floral, geometric, or figurative designs adapted to compact rectangular, oval, or arched formats. | Scale, construction, and surviving hardware can help distinguish a purpose-made furniture panel from a window fragment. Original came thickness, soldering, backing, and evidence of attachment should be consistent with the claimed furniture use. | Look for fatigue from handling, cracked corners, loose came, missing glazing clips, corrosion, and pressure marks from an ill-fitting frame. Check whether the panel has been cut down from a larger window. | Assess the panel and frame separately. A later frame can obscure original edges, while an altered panel may have reduced historical and practical value. |
