Another notable figure from Brno is Georg Placzek, a theoretical physicist born on náměstí Svobody (Freedom Square). He made significant contributions to science, including work on the Manhattan Project, and was the only Czech citizen present at Los Alamos when the first atomic bomb was tested. Placzek also later joined the Institute for Advanced Study at Princeton. Placzek's grandfather, the Chief Rabbi of Moravia, had a keen interest in science and corresponded with Charles Darwin while maintaining a friendship with Gregor Mendel, the father of genetics. In 1860s Brno, it was not uncommon for leading religious figures, such as the Chief Rabbi and the Abbot of the Brno Monastery, to engage in discussions about the latest scientific developments, a unique blending of intellectual and cultural worlds that exemplifies the spirit of the era.