Salts Mill

Salts Mill (sometimes spelled Salt's Mill) is a former textile mill, now an art gallery, shopping centre, and restaurant complex in Saltaire, Bradford, West Yorkshire, England. It was built by Sir Titus Salt in 1853, and the present-day 1853 Gallery takes its name from the date of the building which houses it. The mill has many paintings by the local artist David Hockney on display and also provides offices for Pace plc. 
The Mill and surrounding town of Saltaire was financed and built by the 19th century industrialist and philanthropist Sir Titus Salt after he observed other textile factories and was disappointed by the working conditions he saw there. At the time mill working conditions were commonly poor, with most workers suffering disease, low wages and labour exploitation. Dangerous machinery and long hours, sometimes exceeding 16 hour working days, resulted in frequent accidents. Titus Salt acknowledged this and built a factory and surrounding town with which he intended to improve the working conditions for his employees. When completed, the mill was the largest industrial building in the world by total floor area. It is a grade II* listed building. The mill closed in 1986 and the following year it was sold to Jonathan Silver, who began a long renovation scheme.
Spelling.
The spellings "Salts Mill" and "Salt's Mill" (that is, with and without an apostrophe) are both commonly used. The former is used consistently by the Salts Mill website and the Saltaire Village website; the latter by "Visit Bradford" from the official Bradford Tourist Information service. Both versions are used in the UNESCO World Heritage documentation.
External links.
http://www.saltaire.org.uk/salts-mill
http://roberts-park.org/saltaire-history-timeline-1858-1892/
http://www.bbc.co.uk/legacies/work/england/bradford/article_1.shtml