Harvard College's residential houses and Yale University's residential colleges have established sisterly relationships, much like the Oxbridge sister colleges.[1] The living quarters were made possible by philanthropist Edward S. Harkness. These twinnings are rarely invoked nowadays, except on the weekend of The Game when some houses/colleges find accommodation for visiting rival fans.
In 2005, additional affiliations between Harvard's freshman dormitories, which are not affiliated with Harvard's residential houses and Yale's residential colleges were established in order to accommodate Harvard freshmen at Yale for the 2005 Game. They are not permanent affiliations and may change in the future. They are listed below in parentheses.
| Harvard | Yale |
|---|---|
| Adams House (Weld Hall) |
Saybrook College |
| Cabot House (Wigglesworth Hall) |
Trumbull College |
| Currier House (Canaday Hall) |
Ezra Stiles College |
| Dudley House Pforzheimer House (Matthews Hall) |
Silliman College* |
| Dunster House (Mower, Lionel, and Massachusetts Halls) |
Berkeley College |
| Eliot House (Straus Hall) |
Jonathan Edwards College |
| Kirkland House (Thayer Hall) |
Calhoun College |
| Mather House (Hurlbut and Stoughton Halls) |
Morse College |
| Leverett House (Greenough Hall) |
Timothy Dwight College |
| Lowell House (Grays Hall) |
Pierson College |
| Quincy House (Pennypacker Hall) |
Branford College |
| Winthrop House (Hollis and Holworthy Halls) |
Davenport College |
Although some of these houses and colleges have established links to various Oxford and Cambridge colleges, the ties are not transitive so it is impossible to make a four–column chart.[2]