The Grammaring Guide to English Grammar with Exercises

The definite article with names of places and institutions

The definite article is used before a place name if it consists of an adjective followed by a noun:

the National Gallery

the British Isles

the British Council

the Royal Court

The definite article is also used if the name of a place or an institution contains the possessive of-construction:

the University of Chicago

the Leaning Tower of Pisa

the Tower of London

the Cape of Good Hope

the Island of Lesbos

the Isle of Man

the Gulf of Maine