Answer
The answer is Balliol College. Harlan II, born William Montagu, attended Balliol College at the prestigious University of Oxford in England. He belonged to the Montagu family, a prominent aristocratic lineage with close ties to the British monarchy. During his time at Balliol, Harlan II pursued his academic interests and gained a well-rounded education, which contributed to his future success and influence in the spheres of politics and diplomacy.