UNESCO
On 22 September 2009, Bokova was elected Director-General of UNESCO. She defeated nine candidates at the election in Paris, with Farouk Hosny ultimately being defeated by 31–27 in the fifth and last round of voting. Hosny had been expected to win but attracted criticism from figures such as Nobel Peace laureate Elie Wiesel over his anti-Israel statements. She took over the position from Koïchiro Matsuura of Japan. She entered the office of the Director-General as both the first woman, and the first Southeastern European to take this role.
On 15 October 2009, the 35th session of the General Conference elected Irina Bokova of Bulgaria as the tenth Director-General of UNESCO. The investiture took place in a ceremony in Room I in the afternoon of Friday 23 October 2009.
On 4 October 2013, the executive board of UNESCO nominated her for second term as Director-General. She was re-elected by the UNESCO General Conference on 12 November 2013.
In 2009, while most of the Bulgarian media was supportive of Ms. Bokova's future role at the helm of UNESCO, some raised questions about her past as a daughter of a member of the totalitarian communist elite. Bulgarian-born German writer Iliya Troyanov criticised Bokova's election as Director-General of UNESCO in the Frankfurter Allgemeine Zeitung, calling it "a scandal", in light of Bokova's father's communist past. On the other hand, The New York Times not only published an article, explaining who Mrs. Bokova is, but also officially supported her nomination on the grounds that "[s]he played an active role in Bulgaria's political transformation from Soviet satellite to European Union member. That should be a strong asset in leading an organization badly buffeted in the past by ideological storms."
On 16 January 2014, Irina Bokova yielded to pressure from the Arab League and postponed for five months an exhibit entitled The People, the Book, the Land – 3,500 years of ties between the Jewish people and the Land of Israel, following protest from the Arab states in UNESCO, arguing it would harm the peace process. Invitations had already gone out and the exhibit was scheduled to run from 21 January through 30 January at UNESCO's Paris headquarters with fully prepared exhibition material already in place. In a letter to Bokova, Abdulla al Neaimi, an official from the United Arab Emirates, expressed "deep worry and great disapproval" over the program showing the age old connection between Israel and the Jewish people. The US State Department said it was outraged at the move, "UNESCO's decision is wrong and should be reversed." Canada's Department of Foreign Affairs said "is no appropriate rationale to delay the exhibition and deeply disappointed by the decision made to postpone it". The Wiesenthal Center called the move an "Absolute outrage, the Arabs don't want the world to know that the Jews have a 3,500-year relationship to the Land of Israel". The exhibition was opened on 11 June 2014 in Paris, in a ceremony with participation by Mrs. Bokova and the Dean of the Simon Wiesenthal Center, Rabbi Marvin Hier. The exhibit was co-sponsored by Israel, Canada, and Montenegro, and was called "a breakthrough" by its author, professor Robert Wistrich. On 18 November 2015 Irina Bokova was given the Special Award of the Simon Wiesenthal Center at a ceremony in Washington, D.C., for the inauguration of the exhibition People, Book, Land: The 3,500 year Relationship of the Jewish People with the Holy Land in the U.S. capital. Bokova inaugurated the exhibition in the presence of Edward Royce, Chairman of the House Foreign Affairs Committee, Eliot Engel, Ranking Member of the House Foreign Affairs Committee, Israel's Ambassador to the United States Ron Dermer and Rabbi Marvin Hier.
On 28 March 2015, she launched Unite4Heritage, a campaign aiming to create a global movement "to protect and safeguard heritage in areas where it is threatened by extremists". The campaign was triggered by the programmatic destruction of cultural heritage conducted in Iraq and Syria by the Islamic State of Iraq and the Levant (ISIL) since 2014, in particular after the circulation of videos of looting at Mosul Museum, destruction in the city of Nimrud and the UNESCO World Heritage site of Hatra.
As Director-General of UNESCO, Bokova led efforts to block the trade in Syrian and Iraqi cultural artifacts to fund ISIS and other radical Islamist groups. These efforts led to the adoption of United Nations Security Council Resolution 2199 on 12 February 2015. This resolution officially recognized the link between illicit traffic and security, outlawed all trade in cultural goods from Iraq and Syria and requested that UNESCO coordinate efforts in this area with Interpol. In response to the threat to Iraq's antiquities from increased violence and instability, Bokova implemented an emergency plan to safeguard artifacts of Iraq's cultural heritage.
On 19 October 2015, German DW reported that Japan threatens to halt funding for UNESCO over the organization's decision to include documents relating to the 1937 Nanjing Massacre in the latest listing for its "Memory of the World" program. While the decision is not of the Director-General, a Japanese professor claimed that Mrs. Bokova might have interest in courting China. In October 2016, after opposing an Arab-backed resolution in UNESCO denying Temple Mount's connection to Judaism, Bokova received death threats, prompting her protection to be reinforced.