Territorial Changes of the Ottoman Empire 1817 - 1913
View a series of maps highlighting changes to the Ottoman Empire in green.
![Map of the Ottoman Empire Territory in 1817](/sites/default/files/styles/dynamic_stack_296_1x/public/2022-07/Territorial_changes_of_the_Ottoman_Empire_1817_800x600.jpeg?h=ccb565a9&itok=AN0JbOzo)
Birthright Citizenship Worldwide (2015)
World map highlighting in green which countries recognize birthright citizenship.
![World map highlighting in green which countries recognize birthright citizenship.](/sites/default/files/styles/dynamic_stack_296_1x/public/2022-08/Map_21_World_Birthright_Citizenship_teaser.jpeg?h=1017c59c&itok=kKe6Lhko)
The Changing Geography of the Ottoman Empire (1300–1920)
Maps showing the growth and contraction of territory controlled by the Ottoman Empire from 1300 through 1920.
The Changing Geography of the Ottoman Empire (1300–1920) (en español)
Maps showing the growth and contraction of territory controlled by the Ottoman Empire from 1300 through 1920. This resource is in Spanish.
Global Migration
Use these photographs of global migration to help students explore the experiences of individuals and groups who choose or are forced to leave their homelands.
![Syrian refugees cross from Syria to Turkey via the Orontes River, near the village of Hacipasa, Turkey, Dec. 8, 2012. This image was one in a series of 20 by AP photographers that won the 2013 Pulitzer Prize in Breaking News Photography.](/sites/default/files/styles/dynamic_stack_296_1x/public/2022-06/2013_SyrianRefugeesontheOrontesRiver_FH248167.jpg?h=c9f93661&itok=Gx3XIq0Q)
Rebecca Hamilton: Building a Permanent Anti-genocide Constituency
Rebecca Hamilton shares how she mobilized the Harvard community against genocide in Sudan.
![](/sites/default/files/brightcove/videos/images/posters/image_312.jpg)
United Nations Convention on the Prevention and Crime of Genocide
The Convention on the Prevention and Punishment of the Crime of Genocide, or the Genocide Convention, is an international treaty that criminalizes genocide and obligates state parties to pursue the enforcement of its prohibition.
![A photograph of several delegates who signed the UN Genocide Convention Credit: US Holocaust Memorial Museum, gift of United Nations](/sites/default/files/styles/dynamic_stack_296_1x/public/2022-09/Lemkin_Ratification_Of_Genocide_Convention_FH131485.jpg?h=6db1c67f&itok=hEICVT3F)
Negotiating the Convention on the Punishment and Prevention of the Crime of Genocide
Lemkin proved himself a relentless activist. He worked tirelessly as a lobbyist, a strategist, and an agitator, in order to establish the Genocide Convention with the help of the United Nations on December 9, 1948.
![A photograph of several delegates who signed the UN Genocide Convention Credit: US Holocaust Memorial Museum, gift of United Nations](/sites/default/files/styles/dynamic_stack_296_1x/public/2022-09/Lemkin_Ratification_Of_Genocide_Convention_FH131485.jpg?h=6db1c67f&itok=hEICVT3F)
International Law in the Age of Genocide
While Lemkin was able to convince diplomats at the United Nations to pass the Genocide Convention, his work was not complete upon his death. The job of lobbying governments across the world to ratify the convention was left to ordinary people.
![A photograph of several delegates who signed the UN Genocide Convention Credit: US Holocaust Memorial Museum, gift of United Nations](/sites/default/files/styles/dynamic_stack_296_1x/public/2022-09/Lemkin_Ratification_Of_Genocide_Convention_FH131485.jpg?h=6db1c67f&itok=hEICVT3F)
France, Great Britain, and Russia Joint Declaration, 1915
In 1915, France, Great Britain, and Russia, issued a declaration condemning the ongoing Armenian genocide carried out in the Ottoman Empire and threatening to hold the perpetrators accountable.
![A photograph of several delegates who signed the UN Genocide Convention Credit: US Holocaust Memorial Museum, gift of United Nations](/sites/default/files/styles/dynamic_stack_296_1x/public/2022-09/Lemkin_Ratification_Of_Genocide_Convention_FH131485.jpg?h=6db1c67f&itok=hEICVT3F)