Duke of Leinster in the context of "Leinster House"

Earl of Shrewsbury (/ˈʃroʊzbəri/) is a hereditary title of nobility created twice in the Peerage of England. The second earldom dates to 1442. The holder of the Earldom of Shrewsbury also holds the title of Earl of Waterford (1446) in the Peerage of Ireland and Earl Talbot (1784) in the Peerage of Great Britain. Shrewsbury and Waterford are the oldest earldoms in their peerages held by someone with no higher title (the oldest earldoms in each peerage being held by the Duke of Norfolk and Duke of Leinster), and as such the Earl of Shrewsbury is sometimes described as the premier earl of England and Ireland.

Georgian Dublin is a phrase used in terms of the history of Dublin that has two interwoven meanings:

1. to describe a historic period in the development of the city of Dublin, Ireland, from 1714 (the beginning of the reign of King George I of Great Britain and of Ireland) to the death in 1830 of King George IV. During this period, the reign of the four Georges, hence the word Georgian, covers a particular and unified style, derived from Palladian Architecture, which was used in erecting public and private buildings
2. to describe the modern day surviving buildings in Dublin erected in that period and which share that architectural style

Though, strictly speaking, Georgian architecture could only exist during the reigns of the four Georges, it had its antecedents prior to 1714 and its style of building continued to be erected after 1830, until replaced by later styles named after the then monarch, Queen Victoria, i.e. Victorian.