The Old Jewish Cemetery holds more than twelve thousand stones on a plot barely half a hectare across, and the ground under them is made of graves. It is a mound rather than a flat field, rising well above the lane outside, with stones tilted at every angle and pushed against each other by the earth moving beneath them. Elder trees grow between them. You walk a fixed one-way path with a rope on either side, and you cannot leave the way you came in.
Prague's Jews were forbidden to buy more land, so when the plot filled they buried again on top, and Jewish law does not allow an old grave to be disturbed, so nothing was ever cleared. Researchers count as many as ten layers in places. Rabbi Judah Loew, the scholar later linked to the golem, is here; he died in 1609. So are the astronomer and chronicler David Gans and Mordechai Maisel, the mayor of the Jewish town who paid for much of it. The last burial was in 1787.