Altleiningen castle was built on the domed summit of a hill, about 400 metres high, that rises above the left bank of the Eckbach. The name, like that of its sister castle, Neuleiningen 5 kilometres northeast, is derived from the Frankish noble family of Leiningen, who used to rule the territory of the Leiningerland.
The mighty hill fortress is built on rocks and was probably established around 1100 to 1110 by the Count of Leiningen, Emich I, and his son, Emich II, under the name of Leiningen Castle. The overall castle site, which follows the shape of the hilltop, has a triangular ground plan. Of the original caste, only a few wall remains on the west side have survived. The outer ward was surrounded by its own moat and by a main ditch hewn out of the rock, over which there was a drawbridge that separated it from the actual castle. Two kilometres to the south of the castle, Emich II founded Höningen Abbey around 1120.
During the peasants' uprising in 1525 the castle suffered its first destruction. The present site is based on its rebuilding in the Renaissance style, beginning in 1528, by counts Cuno II, Philip I, Louis and John Casimir. Its reconstruction required the local farmers to render socage.
Around 1600 a gallery was driven deep into the rock below the castle in order to obtain a supply of water. The 20-Pipe Well is today the biggest source of water for the Eckbach.
In 1690 the castle was destroyed again, this time for good, during the War of the Palatine Succession by French troops. Thereafter it was used as a quarry until the mid-19th century when this was banned by the government of the Kingdom of Bavaria. Until 1933 the terrain remained in the hands of the counts of Leiningen (Leiningen-Westerburg-Altleiningen line), before it was procured by the county of Frankenthal. In 1962 the ruins were listed and the schloss wing rebuilt in the six years that followed. In doing so they incorporated the wall remains on the western side.
In 1968 a youth hostel was integrated into the partially rebuilt castle. This was completely modernized between 1998 and 2000. As part of this renovation the castle was given a gable roof again; previously it had had a flat, 1960s-style roof. The great hall is used as a dining room; another guest room is the Burgschänke pub with its summer terrace. The main moat has been converted into a public open air swimming pool.References:
The Arch of Constantine is situated between the Colosseum and the Palatine Hill. It was erected by the Roman Senate to commemorate Constantine I's victory over Maxentius at the Battle of Milvian Bridge in 312. Dedicated in 315, it is the largest Roman triumphal arch. The arch spans the Via triumphalis, the way taken by the emperors when they entered the city in triumph.
Though dedicated to Constantine, much of the decorative material incorporated earlier work from the time of the emperors Trajan (98-117), Hadrian (117-138) and Marcus Aurelius (161-180), and is thus a collage. The last of the existing triumphal arches in Rome, it is also the only one to make extensive use of spolia, reusing several major reliefs from 2nd century imperial monuments, which give a striking and famous stylistic contrast to the sculpture newly created for the arch.
The arch is 21 m high, 25.9 m wide and 7.4 m deep. Above the archways is placed the attic, composed of brickwork reveted (faced) with marble. A staircase within the arch is entered from a door at some height from the ground, on the west side, facing the Palatine Hill. The general design with a main part structured by detached columns and an attic with the main inscription above is modelled after the example of the Arch of Septimius Severus on the Roman Forum.