Cardiff Castle & Castell Coch: The Butes' Gothic Revival Fantasy, with Caerphilly Castle

Cardiff Castle occupies the site of a Roman fort founded in the 1st century AD, whose perimeter walls were incorporated into the Norman shell keep built in the 12th century and are still visible in the castle grounds. The outer walls, gatehouse, and Black Tower date from various medieval phases. The castle's defining character, however, is the transformation carried out by the 3rd Marquess of Bute and his architect William Burges between 1866 and 1927: a suite of state apartments fitted out in an extraordinary polychrome Gothic Revival style that took medieval European, Islamic, and Italianate decoration and merged them into something wholly Bute. The Clock Tower's Lady Bute Bedroom (with a domed ceiling inlaid with astrological symbols), the Arab Room (gilded Moorish stalactite vault and marble walls), the Chaucer Room (panels depicting Canterbury Tales scenes), and the Banqueting Hall form the core of the tour. During the Second World War, the tunnels beneath the castle walls were converted into air raid shelters — the Firing Line Museum covers the military history of the Cardiff garrison alongside the wartime shelters.

From Cardiff Castle, the guide leads a walking tour of the civic core of Cardiff: Cathays Park and its Edwardian civic buildings (City Hall, the National Museum Cardiff), the Victorian Market (a covered iron-and-glass market hall established 1891), the Edwardian shopping arcades (Cardiff has more Victorian and Edwardian arcades than any other city in Britain), and St John the Baptist church (the 15th-century Perpendicular Gothic tower visible from the Hayes is one of the few medieval structures in the city centre). Lunch at The Welsh House — a restaurant serving traditional Welsh dishes including cawl (lamb broth), Welsh rarebit, and laverbread — is included in the tour.

Caerphilly Castle, 13 kilometres north of Cardiff, is the second largest castle complex in Britain after Windsor — at 30 acres, its size achieved not by height but by water. Gilbert de Clare built it between 1268 and 1271 in direct response to the growing power of Llywelyn ap Gruffudd, creating a concentric castle surrounded by three artificial lakes and two moats that made direct assault effectively impossible. The famous leaning southeast tower — tilted approximately 10 degrees from vertical, more than the Leaning Tower of Pisa — was deliberately undermined during the English Civil War. Caerphilly is also featured on a separate Cardiff day trip (with Raglan and Tretower) focused on medieval and rural South Wales sites; here it appears as a complementary stop on a day built around the Cardiff Bute legacy.

Castell Coch — the Red Castle — stands in the Taff gorge nine kilometres north of Cardiff, on the site of a medieval fortress of the Clare and Despenser families that had been ruinous since the 15th century. William Burges, the same architect as Cardiff Castle's apartments, designed the new building for the 3rd Marquess of Bute from 1875 — not as a restoration of the medieval ruins but as a new castle inspired by them, incorporating the original foundations and towers while completely replacing the fabric above ground. The result is the most complete example of Victorian Neo-Gothic castle building in Wales: three circular towers with tall conical roofs, a working drawbridge and portcullis (original and functional), a central courtyard, and interiors of extraordinary elaboration. The Lady Bute bedroom ceiling is painted with astrological medallions; the drawing room vault is covered in hand-painted frescoes of Aesop's Fables; the banqueting hall ceiling is painted with 700 birds of paradise from William Burges's personal aviary records. Burges died in 1881 before the interiors were complete; his team finished the programme under his detailed drawings. Castell Coch was never a primary residence — the Marquess used it occasionally as a Gothic summer retreat — but it was built and decorated to Burges's obsessive specification throughout.