Proper nouns include names, places and organisations.
With names of people or pets, we don't use any article. Likewise with most places or one of a kind things. However, there are a number of exceptions where we use the article 'the'.
We use the article ‘the’ usually for
- Buildings and places when we know what you are talking about. (The Library, The Cinema)
- Seas, lakes and bodies of water (The Adriatic, The Baltic Sea)
- Countries ending in Plurals or groups of islands and mountains (The Philippines, The Dolomites, The Alps)
- Man-made and natural wonders (The Golden Gate Bridge, The Eiffel Tower, The Leaning Tower of Pisa)
- Hotels, Bridges, museums, theatres, zoos, hotel and institutions
- Unique specific roads and streets (the High Street, the motorway, the A6)
- Universities with ‘of’ in the title (The University of Michigan)
- Organs of the body (the heart, the liver, the lungs)
Our video gives more information about when to use an article with proper nouns, with lots of examples.