Haus Carstanjen is famous castle as situated near to the River Rhine in Plittersdorf, a suburb of Bonn, Germany near Bad Godesberg. This particular building was constructed back in 1716. In 1881 Wilhelm Adolf von Carstanjen got the occupation of the building from which this particular classical building is constructed. After 1950, it was occupied by the German Federal Government. It was from 1950 until 1957 it kept the Bundesministerium für Angelegenheiten des Marshallplanes, from 1957 until its dissolution in 1969 the Bundesschatzministerium (Treasury) and, until 1999, the Bundesministerium der Finanzen.

It year 1970s, the Carstanjen family sold out the ground to the Federal government, and sold out part at present is known as to be the Rheinauen Park, and there more structures were constructed out later on. At the time the park was nicknamed as the ‘Schiller Park’, after the former federal finance minister and it housed the Mr. Karl Schiller. As stared in 1996, after German reunification, many a good number of ministries thereon transferred to Berlin, and the offices at Haus Carstanjen were therefore given to the United Nations agencies. The federal government therefore modified the complex building as about on the whopping price of about seven million euros. From the summer of 2006 many of the UN offices were relocated to a new campus in the renovated Langer Eugen tower, and left out the UNFCCC secretariat resident only in Haus Carstanjen. The castle instead and at its original form is made up of an angular, Neo-Gothic three-story building, having two circular turrets, roofed conically in grey slate, mullioned windows, and colonnaded galleries. Further new extension was added to it from about 1967 and formed of two low detached blocks and seven story block and a detached restaurant. The modern office buildings are there is made of the reinforced concrete frame construction and as extensively glazed with steel sun blinds, connected by glazed steel walkways.

Wilhelm Adolf von Carstanjen in 1881 procured the farmland by the Rhine close to Plittersdorf and reconstructed the farm into a residential castle, that he named Haus Carstanjan. There at the south of south of Haus Carstanjen, at towards the river flow there is located the Carstanjen family mausoleum. It took from of a large rotunda as in the style of ancient Greece. The museum has several floors of rich internal and external decoration.

The Bonn–Oberkassel train ferry was operated under the jurisdiction of the German train company the Rhenish Railway Company as between 1870 to connect its right and left Rhine railways. It was one of the prominent train ferries that existed in Germany to carry out the railway operations across the Rhine. When the Bonn-Cologne Railway Company was acquired by the Rhenish Railway Company on 1st January 1857, it constructed the left Rhine railway in sections to Bingerbruck. Its last section was open on 15th December 1859 and was connected to the Hessian Ludwig Railway to South Germany. In 1864, it further created the Pfaffendorfer Rhine bridge beneath the Ehrenbreitstein Fortress and the bridge over the Lahn at Oberlahnstein as to relate it to with the Nassau Rhine Railway of the Nassau State Railway at Niederlahnstein, it was accomplished on 3rd June 1864, making it to be second railway next to the Rhine from the Rhineland to southern Germany, that at present is known as to be the Left Rhine line. The Prussian Government there enhanced the Rhenish Railway to surpass the right bank railway from Niederlahnstein to Oberkassel. The company was provided with a concession as to connect the new line with the left Rhine railway with Bonn by the measures and means of the train ferry.

So, immediately the construction of the train ferry started and the right bank railway was extended north to Neuwied in 1869 and on 27 October 1869 to Oberkassel and the train ferry wharf. A locomotive there pulled up a six-car passenger train off ferry in Bonn. The train ferry there was same like as the two well formed train ferries of the Rhenish Railway, located as between Spyck and Welle and between Rheinhausen and Hochfeld that come into the force and use of the masses in 1865 and 1866, respectively. Hence after the Bonn–Oberkassel ferries started crossing the river employing their own engines with the help of two wire cables as against the slant of 45degree with force against the river in the side to Oberkassel. The three routes were accomplished in about 1868, 1870 and 1873. The ramps from the riverbank stations to the water were slowed down to about at the ratio of about 1:38. The three ferry pontoons on each side were about 70 meters long and 9.5 m wide. Each had the capacity to sustain as much as ten freight wagons, seven passenger carriages or one locomotive. However due to the compulsion of World War I and the improved railway technologies initially temporarily and then permanently, the operations Train ferry end.

Here are mentioned some of the popular theme museums in Bonn

•    Arithmeum: It is one of its own types of mathematics museum in World. In    Bonn owned by the Forschungsinstitut für Diskrete Mathematik (Research Institute for Discrete Mathematics) at the University of Bonn. The museum was established by the Director of the Institute, Bernhard Korte, who provided ample contribution by donation his private collection of calculating machines. The building’s steel-glass facade is for the purpose of showcasing the transparency and the vibrancy of the science. The permanent exhibit “Calculating in Olden and Modern Times” depicts the progression of mechanical calculating machines as in about 1,200 pieces. There are shown the very big large very-large-scale integrated (VLSI) logic chips, historical arithmetic books dating back to Johannes Gutenberg’s times, and samples showing relation between art and science.

•    Kunstmuseum Bonn: It is a Museum of the Modern art in Bonn. It was founded in the year 1947 and its current collections are based upon Rhenish Expressionism and post-war German art. It is part of Bonn’s “Museum Mile”. The present structure that came into operation since 1992 was developed by the BJSS firm (Axel Schultes) and Jürgen Pleuser at on enormous amount of around DM-100 million. It has three entrances, representing the openness. The design of the staircase there has been described as a “precise geometry, cut like jewellery. The conception of light presents the collection to life. The total exhibition area there is about around 4,000 square meters. The collections of the Kunstmuseum emphasizes on three strongpoints: Rhenish Expressionism (the largest collection in the world), post-war German art (particularly the ’60s to the early ’90s), and an international collection of post-war prints. The prominent German artists there showcasing their works include Georg Baselitz, Joseph Beuys, Hanne Darboven, Anselm Kiefer, August Macke and Blinky Palermo. Selected non-German artists follows as Robert Delaunay in the Macke section, Richard Long in combination with Palermo, Lucio Fontana with Beuys, and Jannis Kounellis with Gerhard Merz. The prints collection of the museum has about 5,000 works from the 20th and 21st centuries being named as multiples by Beuys.

•    Deutsches Museum Bonn: This museum exhibits the various works and experiments of renowned scientists, engineers and inventors. Most of the collections in the museum are based upon the central theme of research and technology in Germany after 1945. It is wing of the Deutsches Museum in Munich. It was founded in 1995 on the inspiration of the Association of Sponsors for the Promotion of German Science (Stifterverband für die Deutsche Wissenschaft) in the Science Centre (Wissenschaftszentrum) in Bonn.

The Alexander Koenig Research Museum is a natural history museum and zoological research institution in Bonn, Germany. The museum has derived its name on account of Alexander Koenig, who donated his collection of specimens to the institution. The museum was inaugurated in 1934 and is affiliated to the University of Bonn. The museum was established by the private scholar Alexander Koenig as an individual institute for the zoological research and educating the masses on the issues and topics of the zoological research. He was the son of the wealthy merchant Leopold Koenig as he started collecting birds and animals since its childhood. He then after learned zoology and therefore received a doctorate in natural history in 1884. During the later years, he organized and even funded numerous expeditions to the Arctic and Africa and vastly expanded and increased his private collection of specimens.

After the death of his father in 1903, he planned out a natural history museum to present his personal collection to the public. On September 3, 1912, the foundation stone to the new Museum Alexander Koenig was laid on. At the start of World War I in 1914, the uncompleted building was captured and thus was used as a military hospital and later, until 1923, was used as a barracks by the French occupying forces.  Alexander Koenig, who lost most of his wealth in due course of war, donated the museum and his private properties to the German government in 1929. The museum ultimately opened its doors to the public on May 13, 1934. After World War II the museum building, that was remained to an extent intact due to the war was only symbolic and a huge assembly hall as available in Bonn, the then capital of West Germany. Therefore the museum was used by the Parlamentarischer Rat, the predecessor to the West German Parliament, as on its opening session on September 1, 1948.

Presently the Museum Koenig is located in a complex of several buildings dating from different times and serving different purposes. The building complex presently has the main building, the Villa, the Private Museum and the Clas M. Naumann Building. The main structure of the Museum Koenig keeps the public exhibition and has characteristic of a large central hall with a glass roof. The building was designed by Gustav Holland, who also modeled the Museum Koenig after the Museum of Natural History in Berlin. The Villa is the oldest part of the Museum Koenig and has the vertebrate department. The   building was constructed in 860. Leopold Koenig, father of Alexander Koenig procured the building in 1873. He donated the house to his son in 1884 on receiving the doctoral degree and marrying Margarethe Westphal. Alexander Koenig used the Villa as his and place to keep his bird collection.