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.

The Heart of the City is a long-term project aiming at the redevelopment of the historic centre of Kaliningrad, the area surrounding the former Königsberg Castle and the House of Soviets. The project implementation unit is a Non-governmental organization Urban Planning Bureau “Heart of the City” (Russian name: Градостроительное бюро «Сердце города»), located 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.

The Sackheim Gate (Russian: Закхаймские ворота, tr.: Zakkhaymskie vorota; German: Sackheimer Tor) is one of seven surviving city gates in Kaliningrad, Russia, formerly the German city of Königsberg. It is located at the intersection of Moscow avenue and Lithuanian wall street.

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.

The Propsteikirche (German for "provost church"), also known as the Katholische Kirche (Catholic church), was a Roman Catholic church in the Sackheim quarter of Königsberg, Germany. Its patron saint was John the Baptist.

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

Sackheim Church (German: Sackheimer Kirche) was a Protestant church in the Sackheim quarter of Königsberg, Germany.