Neues Palais Bückeburg

The floor plan of the palace is an elongated rectangle. The large round tower rises a total of 56 meters. On the south side of the building (park side) is the terrace surrounded by balustrades. The built-in natural stones come from the Obernkirchen quarry, which is known worldwide for the unique texture and color of its sandstone. On the north side of the palace is the spacious main portal, whose windows, like those of the upper hall, are covered with pilasters in the course of a return to ancient building traditions. The imposing main staircase leads from the magnificent foyer of the central wing to the hall in front of it on the upper floor. Lavishly framed by a total of 16 columns.
When the builder died in May 1893, the planning of the building was briefly interrupted. But as early as June 25, 1893, the prince's widow Hermine zu Schaumburg-Lippe (*1827, † 1910) commissioned the building. Towards the end of 1896 the building was finally ready for occupancy in its entirety.
In 1960 the Dipl.Chem. dr Kurt Blindow of the palace as a school building, which was sold to the Blindow family by the Prince of Schaumburg-Lippe in 1969. To this day, the palace serves the Dr. Kurt Blindow as a training center for scientific and technical assistants.
Source: schaumburgerland-tourismus.de/de/poi/burg-schloss/neues-palais-bueckeburg/6907877

Don't get confused - this isn't THE lock! ;)

Bückeburg means castle park and the castle, castle church and don't forget the helicopter museum