artifact – n. a simple object, such as a tool or weapon, that was made by people in the past
concentration camps – n. a type of prison where large numbers of people who are not soldiers are kept during a war and are usually forced to live in very bad conditions
climate-controlled – adj. another term for air conditioning
diary – n. a book in which you write down your personal experiences and thoughts each day
holocaust – n. the killing of millions of Jews and other people by the Nazis during World War II
institution – n. an established organization
preserve – v. to keep something in its original state or in good condition