The article is devoted to the publication and analysis of iconographic and cartographic sources on the topography and planography of the town of Isaccea and the adjacent area of the Danube crossing in the 1770s - 1870s. Most of them are associated with hostilities during the Russian-Turkish and Eastern (Crimean) wars, and are stored mainly in the archives and libraries of the Russian Federation. At the indicated time, the Russian army twice sent a ferry across the Danube (1828 and 1854), and Isaccea and its fortresses were attacked at least 10 times. Almost each of them ended in destruction, explosions and fires, and stones from dismantled fortifications were used to build the Satunovsky dam and fortress and Ismaіl. Finally, the Isaccea fortress was demolished after the signing of the Berlin Treaty on July 13, 1878 (Article LII). However, the materials collected and analyzed in the article made it possible to characterize many aspects of the topography of this micro-region, including localizing a number of objects – the Ottoman castle, three mosques, the Pasha’s house and the Moldavian (Greek) church.