1830s, the house was the venue for a number of conferences on unfulfilled Bible prophecies, which were attended by men such as John Nelson Darby and Edward Irving. These conferences were held under the auspices of Theodosia Wingfield Powerscourt, then the widow Lady Powerscourt. Tyrone House, Dublin (1740) Cassels designed this Dublin townhouse for Marcus Beresford, Earl of Tyrone, in Marlborough Street between 1740 and 1745. Smaller than Powerscourt House it is said to be the first substantial aristocratic house to be built in the north of the city. It is a fine example of Cassels' robust sober style. The central Venetian window above the principal entrance is the sole example of decoration or flamboyance in this dramatically severe facade. Leinster House (1745) The house was originally known as Kildare House after James Fitzgerald, the Earl of Kildare, who commissioned Cassels to build it between 1745 and 1747. Intended to be Dublin's grandest mansion, the result could not have disappointed Kildare. It is said that another Irish architect, James Hoban, later copied the facade of Leinster house for his design of the White House in Washington (although Castlecoole designed by James Wyatt bears a closer resemblance). Rotunda Hospital (1757) Originally the main maternity hospital for Dublin, it was redesigned by Cassels who transformed it into a Palladian palace, complete with a rotunda which gives the hospital its name. Waterstown House, Westmeath Built for Gustavus Handcock-Temple in the 1740s, the house which was three stories over the basement and 7 bays wide, was built of brick with stone facing. Cassels work includes a pigeon house (which is almost identical to the Killiney Hill obelisk), walled gardens, a farmyard, and a grotto. The front facade was 7 bays wide and 3 storeys high over a basement. The house was abandoned in 1923. It was sold for scrap in 1928 at which time most of the house was dismantled. Westport House, Mayo Built for Browne in 1730, Westport House is a beautifully sited two-storey over basement ashlar stone house overlooking Clew Bay in County Mayo. Cassels decided to relocate the village of Westport to improve the outlook from the house to the east. The original house was quite small and was later extended by others. Legacy to Ireland Richard Cassels died suddenly in 1751 while at Carton House. He gave Ireland a distinctive type of Palladianism, to appreciate which one has to consider