Gothic architecture
Sens Cathedral (begun between 1135 and 1140) was the first Cathedral to be built in the new style (St. Denis was an abbey, not a Cathedral). Other versions of the new style soon appeared in Noyon Cathedral (begun 1150); Laon Cathedral (begun 1165); and the most famous of all, Notre-Dame de Paris, where construction had begun in 1160.
Architecture of Wales
Another example of the simple Gothic revival style was Gnoll near Neath. This was a remodelling, starting in 1776, of an existing house for Sir Herbert Mackworth, owner of a local copper works. It had a crenulated parapet and round towers at the two corners of the frontage. The architect was John Johnson an Essex architect who had been associated with Mackworth's banking interests in London.
Following this, examples of Strawberry Hill Gothic start appearing in Wales, the most significant of which was Hafod. The first stage of Hafod was started 1786 by Thomas Baldwin of Bath for Thomas Johnes, in a Gothic revival style with gothic window, battlements and pinnacles and then in 1793-4 John Nash added a top-lit galleried library and a 300 ft long conservatory.
Another early pioneer of the Gothic style was James Wyatt who was employed by the Earl of Uxbridge to build Beaudesert in Staffordshire in the Gothic style in 1771-2. The Earl was to employ him again at Plas Newydd on Anglesey to rebuild the West front and the interior in a Gothic style from 1793–9 Wyatt worked with the Lichfield architect James Potter and the style of plasterwork lacks the lightness of Strawberry Hill gothic. 
Plas Newydd was followed by the more remarkable Gothic mansion at Garth at Guilsfield in Montgomeryshire, built for Devereux Mytton, probably in the late 1790s. 
Another house with Strawberry Hill Gothic features was Bodelwyddan Castle which had a Gothic wing and gothic interior added between 1802 and 1808 by an unknown architect. During this period a number of other houses in Wales were given Gothic facades with arched pointed windows, such as Llewenni in Denbighshire. At Hawarden Castle the Palladian house, on a different site to the medieval castle, was transformed by Thomas Cundy in 1809–10 for Sir Stephen Richard Glynne. It was refronted and machicolations, towers and turrets were added. A west wing was added with gothic windows. At Rhiwlas, near Bala the ancient house was re-cased as a Gothic castle in 1809 with three storeys and three polygonal towers, but the house was largely replaced by new house in 1954. The Gate arch by Thomas Rickman of 1813 still exists.