Daniel Taub, Israeli Ambassador to Britain, has made his first campus visit since being appointed.
Mr Taub returned to his old university and spoke to around 150 students at the Oxford Union. He told them how his career had progressed after graduating from the university before showing off his old Oxford Union membership card and answering questions on Israel's social protests and the Middle East peace process.
He also gave lectures at the International Law department and Centre for Hebrew Studies, before later meeting the city's Jewish community.
Mr Taub said: "There are unfortunately situations on campus where it is hard to engage in free and open discussion about Israel. I was very pleased that in Oxford I was met with a genuine openness and willingness to engage and look forward to continuing these discussions with students throughout the UK."
Oxford's Chabad Society held a reception in the ambassador's honour, attended by around 100 students and community members.
Chabad director Rabbi Eli Brackman said it had been an honour to host Mr Taub during his two-day visit.