1854) and Joseph Lindley (born 1859). In 1863 he began work on the sewerage system of Frankfurt am Main, the benefits of which became apparent as between 1868 and 1883 the death rate from typhoid fell from 80 to 10 per 100,000 inhabitants. Lindley's designs were in demand across Europe, and together with his sons he built systems for cities in Germany (including Düsseldorf) and elsewhere, including Saint Petersburg, Budapest, Prague and Moscow. In 1876 the Australian city of Sydney even asked him to design a sewer system for them, but he turned them down as he had just been commissioned by Warsaw in Tsarist Poland. Between 1876 and 1878 he designed the Warsaw waterworks, which were constructed between 1881 and 1889 under the direction of his son, William Heerlein Lindley. To this day, there is a street in Warsaw named after him, which goes around the historical waterworks. Also named after the Lindleys' handiwork is "Filter Street" (ulica Filtrowa). As an interesting sidenote, the system that William Lindley designed for Warsaw is still operational, and the last sewer collector of his design was not replaced until 2001. Memorials Lindley memorial is located in Hamburg near underground station Baumwall at the entrance to sewage system, An exhibition to celebrate his 200th birthday took place from 2008 to 2009 in the hamburgmuseum, Hamburg: "Designer of the modern city. William Lindley in Hamburg and Europe (1808–1900)". The small "Lindleystraße" in Hamburg's Rothenburgsort. "Lindleystraße" in Frankfurt am Main's Osthafen district, on which is located a hotel named "Das Lindley Lindenberg". An English Heritage Blue Plaque commemorating William Lindley and his son Sir William Heerlein Lindley was unveiled on 22 April 2015 at 74 Shooters Hill Road, London SE3 7BG. A memorial bench to Lindley and his sons is located in Multimedialny Fountain Park, near the Old Town in Warsaw, Poland. The bench is fashioned out of water pipes, with a statue of Lindley standing next to it, his hand turning a stopcock. Further reading Gustav Leo, William Lindley. Ein Pionier der technischen Hygiene, Hamburg 1969. Ortwin Pelc/ Susanne Grötz (Ed.), Konstrukteur der modernen Stadt. William Lindley in Hamburg und Europa 1808–1900, exhibition catalogue Museum für Hamburgische Geschichte 01.10.2008–22.09.2008, Hamburg 2008 (Schriftenreihe des Hamburgischen Architekturarchivs). Lindleyowie Dzieje inzynierskiego rodu, Ryszard Zelichowski References External links Norbert Wierecky: Ingenieurportrait von William Lindley. Pionier der technischen Hygiene. In: Deutsche Bauzeitung, Bd. 137 (2003), 6, S.84–90, Online-Version, (PDF)