I'm not aware of a specific event or convention called the "International Convention in Black history." However, there are several significant international conferences, conventions, and events that focus on issues related to Black history, culture, and achievements. These events serve as platforms for scholars, activists, and community members to come together to discuss and celebrate the contributions of people of African descent worldwide.

One notable event is the Pan-African Congress, which has been held at various times throughout history to address issues affecting people of African descent globally. The Pan-African Congresses were instrumental in promoting solidarity among peoples of African descent and advocating for the end of colonialism and racism.

Other important international events that focus on Black history and culture include Black History Month celebrations held in various countries, the African Union's annual African Liberation Day, and academic conferences on African and African diaspora studies.

These events play a crucial role in highlighting the impact and significance of Black history on a global scale and fostering understanding and unity among diverse Black communities worldwide.