Auschwitz Memorial and Museum on Instagram: "📷 The “Arbeit macht frei” gate of the Auschwitz I camp. The inscription over the gate, which meant “work makes one free”, was a cynical promise and a lie given to all the prisoners who entered the camp. It became one of the most recognizable visual icons of Auschwitz."

Fact Bull on Instagram: "Lasers are primarily used in diamond identification for laser inscription, a process of microscopically engraving a unique identification number or symbol on the diamond's girdle (the outer edge). This inscription links the physical stone to its specific grading report, offering a reliable method for verifying its identity and authenticity."

The oldest bas-relief of the coronation of Sassanid king Ardeshir II in Iran