Home / Color Changing Coffee Mugs / Henry Roderick Newman (1833-1918) Porta Dei Canonici, Duomo, Florence - Watercolor on Paper 1879 - Color Changing Mug 11oz
  • Henry Roderick Newman (1833-1918) Porta Dei Canonici, Duomo, Florence - Watercolor on Paper 1879 - Color Changing Mug 11oz 11oz - Go Mug Yourself
  • Henry Roderick Newman (1833-1918) Porta Dei Canonici, Duomo, Florence - Watercolor on Paper 1879 - Color Changing Mug 11oz - Go Mug Yourself
  • Henry Roderick Newman (1833-1918) Porta Dei Canonici, Duomo, Florence - Watercolor on Paper 1879 - Color Changing Mug 11oz - Go Mug Yourself
  • Henry Roderick Newman (1833-1918) Porta Dei Canonici, Duomo, Florence - Watercolor on Paper 1879 - Color Changing Mug 11oz - Go Mug Yourself
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Henry Roderick Newman (1833-1918) Porta Dei Canonici, Duomo, Florence - Watercolor on Paper 1879 - Color Changing Mug 11oz

Henry Roderick Newman (1833-1918) Porta Dei Canonici, Duomo, Florence - Watercolor on Paper 1879 - Color Changing Mug 11oz

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$17.99 USD
$17.99 USD
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Henry Roderick Newman (1833-1918) Porta Dei Canonici, Duomo, Florence - Watercolor on Paper 1879 - Color Morphing Mug Design

This 1879 watercolor by Henry Roderick Newman turns its attention to the Porta Dei Canonici, a gateway at the Duomo in Florence, and treats its stonework as a subject worth careful study.

Visual Elements & Composition

The composition centres on the cathedral entrance itself. Newman builds the view from the layered intricacy of the doorway, with its carved detail and architectural rhythm filling the frame. Watercolour does the work here: thin, transparent washes let the pale stone and shadowed recesses sit side by side without heavy outline, so the eye moves from one tier of ornament to the next. Nothing competes with the gateway. It dominates the sheet entirely.

Meaning & Symbolism

A gateway is a threshold, and the Porta Dei Canonici marks the passage into a building that anchored the civic and spiritual life of Florence for centuries. Newman painted it in 1879, when the Renaissance heritage of the city was being studied and recorded with new seriousness. The picture is less a dramatic scene than a document of structural elegance and historical detail, made by an artist who spent much of his working life in Italy and who understood architecture as a record of the people who built it.

Designed for the Hand and the Morning

A mug is held close and turned slowly in the hand, so the doorway is never seen all at once. Its arches and carved panels come into view one section at a time, the way a visitor reads a facade. The design only fully appears once the mug is warm, when a hot drink is poured in and the watercolour surfaces from the glaze, like a building emerging from morning mist. The gateway becomes a small ritual of its own with every cup.

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Color-changing ceramic mugs with a glossy finish, black exterior, and white interior. Available in one size: 11 oz (≈330 ml). Heat-reactive coating reveals your custom design when filled with hot liquid. BPA- and lead-free, with a comfortable C-handle.

This mug brings a playful twist to the daily coffee or tea ritual. At room temperature, it looks like a simple black mug with a glossy finish. But add a hot beverage, and your chosen design fades into view, showing vivid colors against the white interior.

The ceramic body is durable enough for repeated use, while the C-shaped handle balances comfort and grip. Printing uses sublimation techniques that fuse color into the heat-reactive surface for crisp results when the design appears.

  • Material: ceramic with glossy black exterior and white interior.
  • Size: one standard size, 11 oz (≈330 ml).
  • Finish: glossy glaze with heat-sensitive surface.
  • Printing: sublimation process produces crisp, vibrant colors.
  • Safety: BPA-free and lead-free, suitable for everyday drinks.
  • Effect: design is faintly visible when cold, fully revealed when hot.

Perfect as a novelty gift or a fun personal mug, the heat-reactive design makes coffee breaks more engaging. It works well for morning coffee, afternoon tea, or hot chocolate.

  1. Daily routine: fill with any hot beverage to reveal your chosen artwork.
  2. Gifting: the “magic” reveal makes it a memorable present for birthdays, holidays, or office exchanges.
  3. Office use: sparks conversation while still being practical for everyday drinks.

Note: for best results, avoid designs that rely heavily on deep black backgrounds, as they may blend with the mug’s surface when cold.

Unlike standard mugs, color-changing mugs require gentler care to preserve the heat-reactive coating. Hand-wash only — avoid the dishwasher and abrasive scrubbers, which can damage the finish and reduce the effect.

The mug is safe for short microwave use when heating liquids, but repeated high-heat cycles may shorten the lifespan of the coating. Always allow the mug to cool before washing.

Available in one classic size: 11 oz (approximately 330 ml). It’s large enough for most standard coffee makers and fits comfortably in most cabinets.

Size guide

All measurements are product dimensions in inches.

11 oz
Height (in) 3.78
Diameter (in) 3.23
Diameter w/ handle (in) 4.76

Note: measurements are approximate; slight variations may occur due to manufacturing tolerances.