Kneiphof
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Kneiphof was a quarter of central Königsberg. During the Middle Ages it was one of the three towns that composed the city of Königsberg, the others being Altstadt and Löbenicht. The town was located o
Aerial view of today's Kaliningrad downtown with Kneiphof in the foreground
Oldest remaining seals of (from top) Altstadt (1360), Löbenicht (1413), and Kneiphof (1383)
Kneiphöfische Langgasse in c. 1864
Reconstruction of Kneiphof in Kaliningrad's museum
Seven Bridges of Königsberg
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The Seven Bridges of Königsberg is a historical puzzle asking for a walking tour through the bridges of the city of Königsberg where each of the city's bridges is crossed exactly once. Its mathematica
Kneiphof
…while the town was connected with Vorstadt by the Grüne Brücke (built 1322) and the Köttelbrücke (built 1377). These are five of the bridges in the seven bridges of Königsberg mathematics problem. Euler's proof that no solution is possible provides the foundations for graph theory and the application of topological understanding…
In this picture of the Königsberg Cathedral, the bridge on the right is one of the two surviving bridges from Euler's time.