Museum of the World Ocean

The Brandenburg Gate (Russian: Бранденбургские ворота, tr.: Brandenburgskie vorota, German: Brandenburger Tor) is one of seven surviving city gates in Kaliningrad, the former German city of Königsberg. The gate is located on Bagration Street and is the only gate of Kaliningrad still in use for the intended purpose.

Fort Friedrichsburg or Feste Friedrichsburg was a fort in Königsberg, Germany. The only remnant of the former fort is the Friedrichsburg Gate (Russian: Фридрихсбургские ворота, German: Friedrichsburger Tor) in Kaliningrad, Russia.

Altstadt was a quarter of central Königsberg, Germany. During the Middle Ages it was the most powerful of the three towns that composed the city of Königsberg, the others being Löbenicht and Kneiphof. Its territory is now part of Kaliningrad, Russia.

Altstadt Church (German: Altstädtische Kirche) was a medieval church in the Altstadt quarter of Königsberg, Germany. It was dismantled during the 1820s and replaced with New Altstadt Church.

Haberberg Church (German: Haberberger Kirche) or Holy Trinity Church (German: St. Trinitatis-Kirche) was a Protestant church in the Haberberg quarter of Königsberg, Germany. Its 18th-century Rococo interior was one of the most beautiful in East Prussia.

Haberberg was a mostly residential quarter of southern Königsberg, Germany. Its territory is now part of the Moskovsky District of Kaliningrad, Russia.

The Seven Bridges of Königsberg is a historically notable problem in mathematics. Its negative resolution by Leonhard Euler in 1736 laid the foundations of graph theory and prefigured the idea of topology.The city of Königsberg in Prussia (now Kaliningrad, Russia) was set on both sides of the Pregel River, and included two large islands - Kneiphof and Lomse - which were connected to each other, or to the two mainland portions of the city, by seven bridges.

Königsberg Cathedral (Russian: Кафедральный собор г. Калининграда; German: Königsberger Dom) is a Brick Gothic-style monument in Kaliningrad, Russia, located on Kneiphof island in the Pregel (Pregolya) river. It is the most significant preserved building of the former City of Königsberg, which was largely destroyed in World War II.

Laak was a quarter of western Königsberg, Germany. Its territory is now part of Kaliningrad, Russia.

The Kneiphof Town Hall (German: Kneiphöfisches Rathaus) was the town hall of insular Kneiphof, first an independent town and later a quarter of Königsberg, Germany. It served as Königsberg's city hall from 1724 to 1927, after which it became a museum until its destruction in 1944.The town hall, or Rathaus, was located along Brodbänkenstraße.