Today is Holocaust Memorial Day, marking the liberation of the Auschwitz-Birkenau concentration camp.

In January of 2008, Globe photographer David Gennard was invited to Poland to take part in an initiative designed to educate school children about the Nazi death camp.

His videos recorded the deeply moving tour of the camp, as well as interviews with local pupils, and were later published on the official website of the Auschwitz-Birkenau Memorial and State Museum.

Today, events will be staged across the country in remembrance of victims of the persecution as well genocides in Cambodia, Rwanda, Bosnia, and Darfur.

This year's Holocaust Memorial Day marks the 69th anniversary of the liberation of Auschwitz-Birkenau, the largest of the Nazi’s camps.

Watch the videos below.