Page "Golem" Paragraph 17

Some strictly orthodox Jews believe that the Maharal did actually create a golem.

Menachem Mendel Schneerson ( the last Rebbe of Lubavitch ) wrote that his father-in-law, Yosef Yitzchok Schneersohn, told him that he saw the remains of the Golem in the attic of Alt-Neu Shul.

Rabbi Chaim Noach Levin also wrote in his notes on Megillas Yuchsin that he heard directly from Rabbi Yosef Shaul Halevi, the head of the Rabbinical court of Lemberg, that when he wanted to go see the remains of the Golem, the sexton of the Alt-Neu Shul said that Rabbi Yechezkel Landau had advised against going up to the attic after he himself had gone up.

The evidence for this belief has been analyzed from an orthodox Jewish perspective by Shnayer Z. Leiman.