Columbia Seal
The Seal of Columbia University is the most official symbol of the university since it carries legal weight. It's used by the trustees to place their official approval or stamp on something, e.g. it figures prominently on your diplomas.
You can find the seal in a number of places around campus. A large seal is embedded in the floor of Low Library at the entrance of the Rotunda, and a detailed wood carving of the seal is above to the door to PrezBo's office. The seal can be seen above the stage of the Earl Hall auditorium. Three versions of the seal can be seen above the entrance of Butler Library. Directly above the door is an image of the seal. To the left is a seal with the inscription "Colegii Reg" - King's College. To the right is the same seal with the inscription Universitas Status - State University, making reference to Columbia's brief tenure in the 1780's as New York's flagship public school. Inside Butler you can find the seal on the third floor, plastered into the ceiling above the circulation desk with a chandelier hanging from it. A set of three seals similar to those on Butler are carved above the doors of Hamilton Hall. Additionally, any official documents from the Registrar, such as your transcript have a heat sensitive image of the seal on it, serving as the legal signature of a university official.
Until 2004, the seal rather than the crown was the university's logo on the Columbia Website. Traces of this usage can be seen on older web pages, such as Courseworks. Since then Columbia has used the crown on the home page. It is possible that the University is consciously asserting greater control over where the seal is used since it carries legal weight.
The seal itself is filled with symbolic imagery. Over the head of the seated woman is the (Hebrew) Tetragrammaton, YHVH (Jehovah); the Latin motto around her head means "In Thy light we see light" (Psalm 36:10); the Hebrew phrase on the ribbon is Uri El ("God is my light"), an allusion to Psalm 27:1; and at the feet of the woman is a citation of the New Testament passage commanding Christians to desire the pure milk of God's word (1 Peter 2:1–2).[1]
Gallery
The College of Physicians and Surgeons Seal