Not every adult and even very educated person knows what “toponymy” is. But toponymy surrounds us from the first days of life. Wherever we were born or live—in a city, in a village, or even somewhere in the outskirts—names surround us everywhere. City, district, village, town, street, lake, river, tract... But there are also folk names that are not always marked on the map, but are in everyday life. This is all toponymy. A book by employees of the Toponymic Commission of St. Petersburg A.G. Vladimirovich and A.D. Erofeeva is dedicated to the history of the names of streets and alleys of the Northern capital. From the book we learn why some objects have retained their names since the mid-18th century, while others have changed their names many times. The authors consider the reasons for such renamings, tell how certain names were adopted in the past and how this is happening now.