In 1876, Prince Henry XXII accidentally discovered a magnificent vantage point overlooking the town and the Upper Castle. After a violent storm very close to his deer park, an open space had appeared here. Immediately afterwards, he commissioned Rudolph Reinecken, the future park director, to submit proposals to make this beautiful spot accessible. Soon afterwards, the so-called "Valley of the eleventh hour" The viewpoint was built in the spirit of Romanticism with bridges and steps. The viewpoint was given the name "Ida-Höhe" and soon became the princess's favorite place.

The initiative to erect a memorial stone goes back to Princess Hermine von Schoenaich-Carolath, née Princess Reuss Aelterer Linie. She lost her mother at an early age. At the age of 15, her beloved father, Prince Heinrich XXII, also passed away. Together with her siblings, she wanted to erect an appropriate but simple memorial on the somewhat remote Ida-Höhe. It was the 12th anniversary of the death of the last reigning prince when the monument was inaugurated on April 19, 1914. The Ida-Höhe was decorated with flags and garlands in the colors of Prussia. Distinguished guests, including Count Küngl-Ehrenburg, Baron Gnagnoni, Prince von Schoenaich-Carolath, Prince von Stolberg-Roßla, Prince Heinrich XXVII Reuss Younger Line from Gera, Chief Master of Ceremonies von Eichel and Count von Schlieffen accepted the invitation. Hermione's husband, Prince Johann Georg von Schoenaich-Carolath, gave the actual dedication speech. It was a special expression of the children's gratitude that he was always there for them and gave them a happy childhood.

"... How often did he rest here and remember her with his children!" ... "And whoever stays here, let the peace of the forest embrace him with its full magic and give him in grace what he never denied the immortalized on the sunny days of life and in the most difficult struggles, like the man deeply wounded in his heart: the joy of all the wonders of the beautiful nature of God ..."

After the Second World War, the medallion disappeared without a trace. Goethe's verse "Above all peaks is peace" could now be read on it for many years.

Thanks to numerous donations, including from Baroness Dr. Gisela Schenck zu Schweinsberg, the prince's great-granddaughter, and the initiative of five Greiz residents, a new stone relief with the portrait of Henry XXII was installed in 2020.