, now the Exchange Hotel, a Grade II* listed building •
Cardiff Coal Exchange, The Exchange Hotel, Grade II* Listed Built 1884–86 to the design of Seward & Thomas, on the site of the central gardens of Mount Stuart Square, The Coal Exchange first opened as the Coal and Shipping Exchange as a market floor for trading in coal, and was for many years the hub of the city's prosperous shipping industry. It was built largely in limestone in the French Renaissance style and is one of the most historically important commercial buildings in Wales, illustrating the region's immense commercial power in late 19th and early 20th centuries. It later became a music venue, before being closed indefinitely in 2013 due to building safety issues. Following a series of proposals to demolish the building, Cardiff Council purchased the Coal Exchange, and in 2016 it was announced that the building was to be fully refurbished as a hotel, with a museum detailing the history of the building and of the Cardiff Docks. •
St Line House, Grade II Listed Completed in 1900 by architect H Tudor Thornley, in a free Renaissance style with Dutch influences. It was originally known as'Baltic House', and later (until 2005) 'Beynon House'. •
Baltic House, Grade II Listed Baltic House occupies most of the south side of the square opposite the main entrance of the former Coal Exchange. Formerly it was the site of three houses and an Independent Chapel. It was completed in 1915 by Teather and Wilson, and is an elaborate example of an early 20th century commercial building from the height of city's commercial power. •
St Stephens Church, Grade II Listed The church was designed by architect
E. M. Bruce Vaughan and constructed between 1900–2 to replace a temporary iron frame church and opened as the chapel of St. Mary's. In 1912, it became a separate parish under the name of Saint Stephen. The church was designed in a
Gothic style, the interior dominated by a single
nave with six bays of pointed arches and an arch-braced roof. The exterior includes a bell tower at the northeast corner with an octagonal
spire. The parish was deconsecrated in 1992. •
Aberdare House, Grade II Listed Rebuilt from two houses in 1920 by the architect Henry Budgen. A three-storey building with a 3 bay front in bathstone ashlar with an entrance doorway surround in Portland Stone. •
John Cory & Sons building (Mount Stuart House), Grade II Listed Built 1898 for
John Cory & Sons Ltd Ship owners, by H Tudor Thornley, who was also the architect of Beynon House in the square. •
Marine House,
Grade II Listed Located at the south western end of the square, the building dates to the late 1850s. It formerly comprised three original houses, two facing north and one facing west onto the entrance lane to square. It was adapted for business use in the late 1800s by E W M Corbett. The building is a significant survivor of the oldest domestic buildings in Mount Stuart Square. •
Lloyds Bank,
Grade II Listed Completed in 1891, By E W M Corbett. A three-storey Italianate Bank building in grey coursed stone with bathstone dressings. •
Imperial Buildings The Imperial Hotel was located in the north eastern corner, the building used as the club house for the short-lived Bute United Rowing Club in the late-1880s for ease of access to the Glamorganshire Canal where the club members rowed and held regattas. By the 1920s, it had been replaced by a white tiled five storey structure called Imperial Buildings, which housed a range of businesses, predominantly in the fields of shipping, railways, coal, oil, paint and insurance. Government offices occupied the building by the 1940s, and during the WW2 it was the location of the Naval Flag Officer responsible for defending south Wales ports. It was demolished in the 1970s. •
Gloucester Chambers Construction began in 1890 of the Bute Docks branch of the County of Gloucester Bank, with the ground floor operating as a bank, and the upper floor, known as Gloucester Chambers, used by coal and shipping companies. The first half of the twentieth century saw the building used as a clothing store owned by Evans Roberts Ltd, and later turf accountants and a filing systems company. It was demolished in 1982. == References==