pieces; this was an invention of the laboratory with no evidence of contemporary practice, but is reversible. The significant gaps in the helmet were filled in with polyester resin paste and fine copper gauze. The gauze was cut to fit the size of the holes and edged with tin solder. It was then held in place either by metal bolts put through the original rivet holes, or by the polyester resin paste. This paste was spread atop the gauze, creating a smooth surface that was then coloured with natural powder pigments and shellac dissolved in industrial methylated spirits to match the original tone of the helmet. Finally, the helmet was cleaned with 15% formic acid, washed with distilled water, dried in hot air, and coated with Renaissance Wax. A Perspex mount was built, containing three silicone rubber buffers on which the helmet rests. The restoration was completed in February 1984. Public display The helmet forms part of the permanent collection of the Yorkshire Museum and has been included in many public exhibitions since its discovery. During the 2009–2010 closure of the Yorkshire Museum for a major refurbishment, the helmet was displayed in the British Museum as part of the exhibition Treasures from Medieval York: England's other capital. When the museum reopened in August 2010 the helmet was displayed in the Medieval gallery in the exhibition Medieval York: The Power and the Glory. From 2012–2013 it was displayed in the York 1212: The Making of a City exhibition, celebrating 800 years since York received a Royal charter. From 8 April to 5 May 2017, the helmet was on display in the Jorvik Viking Centre. From 2017 the helmet formed part of a touring exhibition titled Viking: Rediscover the Legend and was displayed alongside the Bedale Hoard, the Vale of York hoard and the Cuerdale hoard, with the tour starting at the Yorkshire Museum in May 2017 with subsequent displays at the Atkinson Art Gallery and Library in Southport, Aberdeen Art Gallery, Norwich Castle Museum, and the University of Nottingham. The helmet went back on display at the Yorkshire Museum in September 2019. See also Nasal helmet Viking Age arms and armour Citations General and cited references (US edition: Overlook Press) External links 1982 archaeological discoveries 8th-century works Anglo-Saxon archaeology Anglo-Saxon art Archaeological artifacts Collections of the Yorkshire Museum Individual helmets Medieval European metalwork objects Medieval helmets Coppergate ru:Вендельские шлемы#Коппергейтский шлем