Wovon man nicht sprechen kann, daruber muß man schweigen.
Ludwig Wittgenstein,
Tractatus logic-philosophicus. 1918

מה שלא ניתן לדבר אודותיו, יש לעבור עליו בשתיקה.
לודוויג ויטגנשטיין, טראקטאט לוגי-פילוסופי, 1918.
מגרמנית משה קרוי

The tiles in Entin Square, which is located at the entrance to Tel Aviv University, include covertions and comments by scientists and other intellectuals.

In the current tile, one of the seven claims that make up the book of the Austrian-British philosopher Ludwig Wittgenstein

Three months later, the tiles were photographed in the same square. During the photograph, it was discovered that a number of tiles had been removed and replaced by other tiles . In this tile the design is different, see the other tile Click for cover's details

More details can be found here Click for the item in The ultimate street signs site

Translation of the text on the cover:
Whereof one can not speak, thereof one must be silent.
Ludwig Wittgenstein,
Tractatus logic-philosophicus. 1918