Work has begun revamping the British Engineerium, the industrial museum in the heart of Hove.
The buildings were built between 1865 and 1876 and originally provided water to Brighton and Hove via giant steam pumps.
The collection closed in 1952 but reopened again in the 1970s when it was transformed into a museum and exhibition hall.
In 2006 it closed, and was bought at auction by Brighton property developer Mike Holland, who drew up grand plans to restore it to its former glory.
Work was delayed last year after fears were raised about the safety of badgers on the site.
It will be holding an open day on Sunday October 28, from 11am until 4pm so people can see how the renovations are coming along.
Admission will be £5 for adults and £3 for under-14s. Children in pushchairs are free. All money raised goes towards the British Engineerium Trust and the continued renovations.
The pump house and engine will be under full steam so you will be able to view the Victorian machinery as it was working over one and a half centuries ago.