Senjak (Сењак, sêɲaːk) is an urban neighborhood of Belgrade, the capital city of Serbia. Located in Savski Venac, one of the three municipalities that constitute the very center of the city, it is an affluent neighborhood containing embassies, diplomatic residences, and mansions. Senjak is generally considered one of the wealthiest parts of Belgrade.
Before it became interesting to Belgrade's upper classes, Senjak was an excellent natural lookout. As many farmers kept their hay throughout the entire city, fires were quite frequent, so it was ordered for hay to be collected and kept in one place, and the area of modern Senjak was chosen, apparently also getting its name in the process (from the word seno, Serbian for hay). Especially bad was the fire in the late September 1857, when almost all stacks of hay stored in the Belgrade Fortress burned. Also, the hay for army horses was kept here in the late 19th century. A more romantic theory of the neighborhood's name (from the word sena, Serbian for 'shade' or 'shadow') developed later.
On the east, Senjak was bounded by the Topčider Road, which connected downtown Belgrade to the forests of Košutnjak and Topčider. The road section on the northern slope, between Senjak and western part of Točidersko Brdo, is today named Bulevar Vojvode Putnika. This section of the street was embellished with the quadruple chestnut avenue in the late 19th century. Southern section, which swerved around Senjak, was embellished with the avenue of poplars. Senjak and the neighboring Topčidersko Brdo are today quite wooded for the urban areas. This is the result of the 1923 Belgrade's general plan. One of the main projects regarding the green areas was forestation of the hill, formation of the new park and establishment of the continuous green area with the Topčider Park. Project started in 1926 while the Hyde Park was finished in the 1930s. Today, the continuous Topčider-Košutnjak parks and forests make the largest "green massif" in the immediate vicinity of Belgrade's urban tissue.