R.L. Roumieu designed the French Hospital in Victoria Park, Hackney in 1857. It was built by 1865, requisitioned in 1941 and moved to Rochester in 1960 where there is a portrait of Roumieu. His design was described at the time as ‘a French chateau of the age Francis 1’. Roumieu supervised the building of the hospital himself as the surveyor fell out with him.
His practise was continued by his son Reginald St Aubyn Roumieu ARIBA who worked with two partners, firstly Thomas Kesteven and then Alfred Aitchison. He seems not to have been as productive as his father, but was better known for his philanthropy. His obit in The Builder (7 July 1877) lists many of the charities he was involved in, and for which he was made a Knight of Grace of the Order of St John of Jerusalem. He was governor of the Foundling Hospital, London; Honorary Architect and Director of the French Hospital, Hackney, which was designed by his father; and he helped to found the Huguenot Society of which he was Treasurer and later President.