Temperate House
Panoramic view of the Temperate House
Type	Greenhouse
Location	Kew Gardens, London
Coordinates	51°28′29″N 0°17′44″W / 51.474664°N 0.295470°W / 51.474664; -0.295470
Area	52,527 ft2 (4,880 m2)
Height	62 ft (19 m)
Built	1860–97
Restored	2014–15
Restored by	Donald Insall Associates
Current use	Greenhouse
Architects	Decimus Burton, Richard Turner
Architectural style(s)	Renaissance Revival
Owner	Royal Botanic Gardens, Kew
Website	www.kew.org/kew-gardens/whats-in-the-gardens/temperate-house
Listed Building – Grade I
Official name	Temperate House
Designated	10 January 1950
Reference no.	1262590[1]
Location of Temperate House in London Borough of Richmond upon Thames

At 628ft long the Temperate House is the largest surviving Victorian glasshouse in the world, twice the size of the Palm House, also designed by architect Decimus Burton and iron-founder Richard Turner.

The Temperate House, opened in May 1863, is a Grade I-listed showhouse for the largest plants in Kew Royal Botanic Gardens.^[2] Rectangular, with pitched roofs, its pillars support wrought-iron ribs. Decimus Burton and Irish engineer, Richard Turner, the designers, gave the House a mix of decorative motifs, finials, pediments, acanthus leaf capitals, Coade stone urns and statues. According to Greg Redwood, Kew's head of glasshouses, "The effect is similar to the contemporary iron pier pavilions of Eugenius Birch."

Although construction began in 1860, it would not be completed until 1899.^[2] It was positioned to be the first feature visitors saw as they entered the gates with the anticipated coming of the first railway station at Kew expected to be at the end of the adjacent avenue. However, Kew Gardens rail station was built 500 yards to the north, leaving the glasshouse "somewhat stranded in the landscape".^[3]

In 2011 Kew launched a £15m public appeal to address necessary repairs to the Temperate House. An early exercise in cast- and wrought-iron and glass construction, the building is structurally sound but the Victorians hid utilitarian features like drainpipes inside the stone columns. Water round the edge of the building led to rust on the iron to push against the masonry which was falling away. Decorative features made of wood were rotting. It last underwent a major restoration in the early 1980s. The building was restored during 2014–15 by Donald Insall Associates, based on their conservation management plan.^[4]

There is a viewing gallery in the central section from which visitors are able to look down on that part of the collection. It was re-opened to the public in May 2018.

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