He oversees one of the world's first purpose-built upright cemeteries ... There are no coffins or headstones in the cemetery. Instead, there's a memorial wall with a small plaque for each person ...

The monument consists of about 6,000 cobblestones made from Jewish headstones that were used in 1987 to pave Prague’s Wenceslas Square, the national broadcaster Česka Televize reported.