The
existence of the Castle Landestrost was first mentioned in documents that date
back to 1320. To the best of our
knowledge, a fire destroyed the castle in 1573 and it had to be built up again
by Duke Erich II. The construction
plans originated from Dutch and Italian architects, and as the plans
were completed, a mighty fortress of castle and city arose. It was only after the death of Duke Erich
II, however, that the construction was completed. To cover the costs, the
citizens had to perform trade services and accept an increase in taxes. The
first illustration of the castle and the fortress Landestrost comes from the
year 1650.
Gradually, some essential architectural changes were performed. A new entrance
on the northern side was created, while on the eastern side an old entrance was
closed. On the side nearest the river Leine, the original windows were replaced
with simple wooden windows and, to a great extent; the originals
were kept in the internal courtyard.

The castle architecture
Underneath
the castle there is a quarry stone Spitztonnen vault, which is connected
to the catacombs under the fortress. The walls were built using Friesen,
Simsen and other similar bricks. The entrance gates are adorned with
decorative sandstone ornaments. The southern wing was the oldest part of the
castle and in the 18th century it was already extremely damaged, so that the
wing had to be broken down. In the beginning of 1973, reconstruction of the
castle and fortress began, and a recreation park, the Amtsgarten, was
established.
During
construction, a secret door, which was hidden for more than half a century, was
discovered beneath the crumbled walls. This door on the eastern side is older
than the other three entrances. Each entrance bears the coat of arms of the
Duke Erich II. Only above the middle entrance is the coat of arms for his wife,
Dorothea, also mounted. The keystone of each entrance is a proud lion’s head.

Vault, walls, and champagne cellar
Originally,
a 944-meter rampart encompassed Neustadt. It was supported almost continually
by walls totalling 1,863 meters in length, which varied in width from 2.33
meters to 4.67 meters. The ramparts
were between 37 and 42 meters thick and the walls and the ramparts stood 9.34
meters tall. The stones that were used for building the castle came from the
Deister hills. The red bricks were made in a brick factory in Wunstorf and the
quarry stones came from the Stemmer and Gehrdener Mountains. In the year 1888
Fritz Kollmeyer and his French partner Dupres founded the company Dupres in
Reims. Dupres and Co. began to produce champagne in Neustadt in the Kasematten
(basement) under the castle and in an underground passageway. Beginning with
the first bottles, Champagne from Neustadt has been produced using the méthode
champagnoise. The champagne cellars of Neustadt have since become the most
northern champagne cellars in Europe and are closely related to the history of
the castle Landestrost.

Child in the wall
According
to legend, during the construction of the fortress in the swamps of the Leine,
a living child was purposely enclosed in the castle wall. The Duke had insisted on finishing the
construction of the walls rapidly, so the sacrifice of the child was
superstitiously made to ensure that the walls did not collapse. As no mother in town was willing to give her
child away, they finally asked a gypsy who was agreed to hand over her child in
exchange for some money. Soon after the sacrifice the mother had a guilty
conscience and drowned herself in the waters of the fortress ditch. A relief in
the wall remains to inform visitors of this story.
In
the Amtsgarten in the western part of the arrow-shaped fortress, an
18th-century iron cannon is mounted on a Lafette gun carriage
reconstructed from oak beams according to historic plans. From east to west a beech grove walkway
crosses the Amtsgarten. Treetops from both sides meet in an arch to form
a shady footpath.