1.24wmf8/skins/common/images/magnify-clip.png" width="15" height="11" alt="" /></a></div>
A sign of the heaviest flood in St. Petersburg (1824) at the intersection of the Cadet line and the Bolshoi Prospekt of <a href="//en.wikipedia.org/wiki/Vasilievsky_Island" title="Vasilievsky Island" class="mw-redirect">Vasilievsky Island</a></div>
</div>
</div>
<p>Prior to the founding of St. Petersburg in 1703, the largest flood occurred in 1691. Swedish annals report that the water covered the entire area of the pre