Armley Mills Leeds Industrial Museum is an industrial heritage museum near Leeds. It is based in what was once a working mill. Today the museum includes collections of textile machinery, railway equipment and heavy engineering. It is part of the museums and galleries of Leeds. Armley Mills is located on the south bank and an island in the River Aire. The Leeds Industrial Museum is located in a hydrogeologically critical area and suffered damage in the 2015 Boxing Day flood, but has since reopened. The city of Leeds has historically been an industrial powerhouse in the eighteenth and nineteenth centuries. Consequently, the collections held in the museum are intended to reflect the historical and contemporary industrial heritage of the city: archives and objects belonging to John Smeaton, Matthew Murray, Systime Computers, Elizabeth Beecroft and many others are included. The museum also has a large collection of standard gauge and narrow gauge railway material. The collection was put together in 1956 when the Leeds City Museum acquired Barber from the recently closed Harrogate Gas Works Railway. A short display line is installed in Armley which allows part of the collection to be set in motion.