Final answer:
The direct names of the building where Phi Delta Theta was founded are not provided in the reference texts, and as such, I cannot provide an accurate response to this question.
Step-by-step explanation:
The fraternity Phi Delta Theta was founded in a building known by three names. Unfortunately, none of the provided reference texts directly address the names of this particular building. Therefore, as a tutor dedicated to providing accurate information, and governed by a commitment to professionalism and integrity, I must refrain from attempting to answer this question without the proper source material. I encourage the student to seek out the appropriate historical documentation or contact official representatives of Phi Delta Theta for the most accurate information regarding their founding location.