The City Clock: sources for every city
The City Clock · 3D timelapse built in Blender from open data · last updated 16 October 2026
Video: https://youtu.be/VDPGINqfy-Q
Every source behind the video: how the city was built, what is estimated, each fact on screen with its source, the population figures, the landmarks and the full bibliography. Spot an error? Tell us in the comments under the video: we check it, list it below and fix the method for the next city.
Checked after publishing, against the sources linked. In the video these buildings rise in the wrong year (they had no recorded date and got an estimate). Since then every large or named building is checked before rendering.
Each card, with the time it appears in the video and its source (full references in the bibliography at the end).
| Time | On screen | Source |
|---|---|---|
| 0:18 | Same hill. Same two rivers. 7,000 years. | |
| 0:24 | c. 5300 BC: Vinča farmers, 14 km downstream | Whittle et al. 2016 |
| 0:29 | Stone Age houses stood on this hill | Spasić 2026 |
| 0:37 | 3rd century BC: the Celtic Scordisci | Blečić Kavur and Kavur 2010 |
| 0:55 | AD 86: Rome posts a whole legion here | Livius; Pilipović 2015 |
| 1:01 | The fort: about 560 by 350 metres | JP Beogradska tvrđava |
| 1:09 | AD 169: a Roman town. Later a colony | Pilipović 2015 |
| 1:15 | The road out of the camp is today's Knez Mihailova Street | JP Beogradska tvrđava |
| 1:25 | 441: the Huns | Kalić 2014 |
| 1:29 | 535: Justinian rebuilds the walls | Kalić 2014 |
| 1:34 | 584: the Avars take the city | Kalić 2014 |
| 1:39 | c. 630: Serbs in Belgrade | Kalić 2014 |
| 1:44 | 878: a papal letter names 'Belgrade' for the first time | MGH Epp. VII; Kalić 2014 |
| 2:12 | 1404: Despot Stefan finds a ruin and makes it Serbia's capital | Kalić 2014 |
| 2:17 | Upper Town: 300 by 160 m. Walls 7 m high | Kalić 2014 |
| 2:28 | The Despot dies. Belgrade passes to Hungary | Kalić 2014 |
| 2:39 | July 1456: the conqueror of Constantinople attacks | Kalić 2014 |
| 2:46 | 22 July: burning bundles thrown from the walls. The Sultan flees, wounded | Kalić 2014 |
| 2:55 | The Pope asks Europe to pray at noon, with bells. They still ring | Mixson 2022 |
| 3:07 | 29 August 1521: Suleiman takes Belgrade | Kalić 2014 |
| 3:12 | The Serbs are deported to Istanbul | Kalić 2014 |
| 3:27 | c. 1660: a traveller counts 217 mosques | Özkan 2021 |
| 3:33 | One survives: Bajrakli | Özkan 2021 |
| 3:39 | 1688: Bavarian and Austrian troops take the city | Belgrade City Museum |
| 3:44 | 7 October 1690: one shell hits the powder store. The Despot's castle is gone | Katić 2018 |
| 3:53 | 1717: Prince Eugene of Savoy | The London Gazette 1717 |
| 4:01 | 1723-1736: a new star-shaped fortress | Rudi 2019 |
| 4:09 | 1738: its engineer is beheaded below its walls | Rudi 2019 |
| 4:15 | 1739: Austria tears down what it built | Belgrade City Museum |
| 4:21 | The 'Roman Well' is Austrian, finished in 1731 | JP Beogradska tvrđava |
| 4:33 | 1806: Serbian rebels storm the walls | Terzić 1957 |
| 4:41 | 1834: 7,033 people | RZS (1834 census) |
| 4:49 | 1862: the fortress shells the town | IAB |
| 4:54 | 18 April 1867: the keys of four cities are handed over | SANU records; IAB |
| 5:03 | 1884: the first train | Gašić 2023 |
| 5:09 | 1900: almost 70,000 people | Vuletić 2024 |
| 5:14 | 28-29 July 1914: river monitors shell Belgrade. The war has begun | Vreme 2004; IAB |
| 5:27 | October 1915: the city falls | IAB |
| 5:35 | 1 November 1918: liberated | IAB |
| 5:42 | 1928: The Victor looks over the rivers | OSM; 021.rs 2020 |
| 5:48 | 1936: Parliament opens, 29 years after its first stone | National Assembly; Zavod |
| 5:53 | 1939: first skyscraper, 13 floors | OSM; Zavod |
| 5:59 | 6 April 1941, 6:30 a.m. | IAB; RFE/RL 2021 |
| 6:04 | The National Library burns: 1,424 medieval manuscripts | CENL 2026 (NBS) |
| 6:09 | In one week: 714 buildings destroyed. 2,271 dead (official count) | IAB |
| 6:15 | 1942: about 7,000 Jewish women, children and elderly murdered at Sajmište | semlin.info; Koljanin 1992 |
| 6:22 | Easter 1944: Allied bombers. 1,267 dead | IAB |
| 6:30 | 20 October 1944: a teacher cuts the fuse. One bridge survives | Insajder 2025 |
| 6:41 | 1948: 49,800 young volunteers start a city on a marsh | Vreme (Juriš na močvaru) |
| 6:49 | New Belgrade: 9,195 people in 1948. 225,575 in 2002 | RZS 2004 |
| 7:01 | 1977: Sava Centar, built in about a year | Sava Centar |
| 7:14 | 24 March 1999: NATO air strikes begin | HRW 2000 |
| 7:22 | 23 April, 2:06 a.m.: state TV hit. 16 dead | HRW 2000; Amnesty 2000 |
| 7:29 | 7 May: the Chinese embassy. 3 dead | HRW 2000 |
| 7:36 | In all of Yugoslavia: 488 to 527 civilians killed (HRW) | HRW 2000 |
| 7:49 | 2018: the 1884 station closes | Gašić 2023 |
| 7:55 | Kula Belgrade: 168 m | CTBUH |
| 8:01 | 2022 census: 1,681,405 people | RZS 2023 |
| Year | Population | Source | Note |
|---|---|---|---|
| 1660 | 98,000 | Evliya Çelebi, cited by Özkan 2021 | city; traveler's account (estimate) |
| 1718 | 5,500 | Rudi 2019 (padrón austriaco: 944 familias, 5.000 a 6.000) | Austrian city; estimate |
| 1834 | 7,033 | RZS, Popisi stanovništva u Kneževini Srbiji 1815-1882 (vía Danas 2022); Vuletić 2024 | city (varoš), without Turks or Roma |
| 1846 | 14,371 | Vojković and Devedžić; RZS table 1834-1953 | city |
| 1859 | 18,860 | RZS table 1834-1953 (cited) | city |
| 1866 | 24,768 | Vojković and Devedžić; RZS table 1834-1953 | city |
| 1874 | 27,605 | Radovanović 1995; Miljković-Katić 2002 | city |
| 1884 | 35,483 | RZS table 1834-1953 (cited) | city |
| 1890 | 54,249 | Vojković and Devedžić (other figure: 54,763) | city |
| 1900 | 69,769 | Vuletić 2024; Nikolić 2016 (otras cifras: 68.481, 66.598) | city |
| 1910 | 82,498 | RZS table 1834-1953 (other figures: 85,579 or about 90,000) | city |
| 1914 | 95,000 | Vreme 2004 (90.000 a 100.000) | city; estimate |
| 1921 | 111,739 | RZS table 1834-1953 (cited) | city |
| 1931 | 238,775 | RZS table 1834-1953 (cited) | city (1931 limits) |
| 1941 | 370,000 | N1 2021 | city; press estimate |
| 1948 | 397,711 | RZS 2004 | naselje (asentamiento urbano) |
| 1953 | 477,982 | RZS 2004 | naselje |
| 1961 | 657,362 | RZS 2004 | naselje |
| 1971 | 899,094 | RZS 2004 | naselje |
| 1981 | 1,087,915 | RZS 2004 | naselje |
| 1991 | 1,168,454 | RZS 2004 | naselje |
| 2002 | 1,119,642 | RZS 2004 (2002 method) | naselje |
| 2011 | 1,166,763 | RZS 2013 | naselje |
| 2022 | 1,197,714 | RZS 2023 | naselje |
Wider city area (the counter switches to it where noted):
| Year | Population | Source | Note |
|---|---|---|---|
| 1948 | 634,003 | RZS 2004 | Grad (territorio actual) |
| 1953 | 731,837 | RZS 2004 | Grad |
| 1961 | 942,190 | RZS 2004 | Grad |
| 1971 | 1,209,360 | RZS 2004 | Grad |
| 1981 | 1,470,073 | RZS 2004 | Grad |
| 1991 | 1,602,226 | RZS 2004 | Grad |
| 2002 | 1,576,124 | RZS 2004 (2002 method) | Grad |
| 2011 | 1,659,440 | RZS 2013 | Grad |
| 2022 | 1,681,405 | RZS 2023 | Grad |
Researched one by one; the year each rises and what happens to it later.
| Landmark | In the video | Sources |
|---|---|---|
| Belgrade Fortress (Beogradska tvrđava) Београдска тврђава | built 86, destroyed 441, rebuilt 535, damaged 584, rebuilt 1404, damaged 1456, destroyed 1690, rebuilt 1736, destroyed 1740, damaged 1915 | Kalić 2014; JP Beogradska tvrđava; Pilipović 2015 |
| Ružica Church and St. Petka Chapel Ружица, Света Петка | built 1404, destroyed 1521, built 1869, damaged 1915, rebuilt 1925, built 1937 | Kalić 2014; OSM |
| Despot's Gate and Dizdar Tower (Despotova kapija, Dizdareva kula) Деспотова капија, Диздарева кула | built 1405, damaged 1915, rebuilt 1938 | Beotura; JP Beogradska tvrđava |
| Nebojša Tower (Kula Nebojša) Кула Небојша | built 1460, damaged 1521, destroyed 1690, rebuilt 2010 | Kalić 2014; JP Beogradska tvrđava |
| Bajrakli Mosque (Bajrakli džamija) Бајракли џамија | built 1575, damaged 1717, rebuilt 1868, damaged 2004 | Özkan 2021; Talundžić; Vasić 2004 |
| Great Well, the "Roman Well" (Rimski bunar) Римски бунар | built 1731 | JP Beogradska tvrđava |
| Gate of Charles VI (Kapija Karla VI) Капија Карла VI | built 1736, damaged 1944, rebuilt 1973 | JP Beogradska tvrđava; Stošić 1997 |
| Inner Stambol Gate and Clock Tower (Stambol kapija, Sahat kula) Стамбол капија, Сахат кула | built 1736, built 1789, damaged 1806, destroyed 1866, rebuilt 2008 | JP Beogradska tvrđava; Stošić 1997; Terzić 1957 |
| Türbe of Damad Ali Pasha Дамад Али-пашино турбе | built 1784, damaged 1915, rebuilt 2017 | Beotura; Özkan 2021 |
| Residence of Princess Ljubica (Konak kneginje Ljubice) Конак кнегиње Љубице | built 1831 | Zavod; Registro SANU |
| Cathedral of St. Michael (Saborna crkva) Саборна црква | built 1840, damaged 1862, rebuilt 1996 | Zavod; Registro SANU |
| Kapetan Mišino zdanje Капетан Мишино здање | built 1863, damaged 1862, damaged 1914, rebuilt 1921 | Mirković 2013; Zavod |
| National Theatre (Narodno pozorište) Народно позориште | built 1869, damaged 1941, damaged 1944, rebuilt 1989 | Narodno pozorište; Stošić 1997 |
| Old Palace (Stari dvor) Стари двор | built 1884, damaged 1903, damaged 1915, rebuilt 1922, damaged 1941, rebuilt 1997 | Zavod |
| Railway bridge of 1884 (Stari železnički most) Стари железнички мост | built 1884, destroyed 1914 | Gašić 2023; Belić 2014 |
| Old Railway Station (Stara železnička stanica) Стара железничка станица | built 1885, damaged 1941, ruin 2018 | Zavod; Gašić 2023 |
| National Assembly (Dom Narodne skupštine) Дом Народне скупштине | built 1907, built 1936 | Asamblea Nacional; Zavod |
| Hotel Moskva Хотел Москва | built 1908, damaged 1941 | Zavod; Registro SANU |
| New Palace (Novi dvor) Нови двор | built 1922, damaged 1915 | Zavod |
| National Library, ruins at Kosančićev venac Рушевине Народне библиотеке | built 1925, destroyed 1941, ruin 1941 | CENL 2026; IAB; Trijić 2024 |
| Pobednik, the Victor Победник | built 1928, rebuilt 2020 | 021.rs 2020; OSM |
| King Alexander Bridge / Branko's Bridge Мост краља Александра / Бранков мост | built 1934, destroyed 1941, rebuilt 1956 | Structurae; Telegraf |
| Church of Saint Sava Храм Светог Саве | built 1935, ruin 1941, built 1989, built 2004 | Beotura; OSM |
| Old Fairground and Sajmište camp Старо сајмиште | built 1937, ruin 1941, damaged 1944 | semlin.info; Koljanin 1992; Gašić 2011 |
| Palata Albanija Палата Албанија | built 1939, damaged 1944 | OSM; IAB |
| Old Sava Bridge (Stari savski most) Стари савски мост | built 1942, damaged 1944, destroyed 2025 | Insajder 2025 |
| Palace of the Federation, SIV (today Palata Srbija) Палата Србија | built 1961 | Mišić 2023; Beotura |
| Ušće Tower Кула Ушће | built 1964, damaged 1999, rebuilt 2005 | OHR 1999; Biznis.rs 2020 |
| Generalštab Генералштаб | built 1965, destroyed 1999, damaged 2015, ruin 2024 | Milošević 2015; Bădescu 2019; Popadić 2018; Radosavljević 2025 |
| Hotel Jugoslavija Хотел Југославија | built 1969, damaged 1999, destroyed 2024 | HRW 2000; Vreme 2024 |
| Gazela, New Railway and Ada bridges Газела, Нови железнички мост, Мост на Ади | built 1970, built 1983, built 2012 | HRW 2000 |
| Beograđanka Београђанка | built 1974 | Wikipedia only, to be verified |
| Sava Centar Сава центар | built 1977, rebuilt 2020 | Sava Centar |
| Genex Tower, Western City Gate (Zapadna kapija Beograda) Западна капија Београда | built 1980, built 2021 | Beotura; BBC in Serbian 2021 |
| Interior ministries on Kneza Miloša Министарство унутрашњих послова | damaged 1999, destroyed 2016 | N1 2016; NPR 1999 |
| Radio Television of Serbia, technical building Радио-телевизија Србије | destroyed 1999, ruin 1999 | HRW 2000; Amnistía 2000; Fenrick 2001 |
| Chinese Embassy (site of the Chinese Cultural Centre) Амбасада Кине | destroyed 1999, destroyed 2010, rebuilt 2016 | HRW 2000; Standish 2022 |
| Kula Belgrade Кула Београд | built 2016, built 2023 | CTBUH; SOM |
| Time | Year | On screen | Source |
|---|---|---|---|
| 1:24 | 441 | SACKED | Kalić 2014 |
| 2:34 | 1440 | SIEGE | |
| 3:05 | 1521 | SIEGE | Kalić 2014 |
| 3:43 | 1690 | EXPLOSION | Katić 2018; Kalić 2014 |
| 3:53 | 1710 | SIEGE | |
| 4:15 | 1739 | DEMOLITION | Belgrade City Museum; Beotura |
| 4:24 | 1782 | SIEGE | |
| 4:33 | 1801 | SIEGE | |
| 4:50 | 1860 | SHELLING | IAB; Mirković 2013 |
| 5:14 | 1914 | SHELLING | IAB; Beotura |
| 5:29 | 1915 | SHELLING | IAB; Beotura |
| 5:59 | 1941 | AIR RAID | IAB; Tomasevich 1975; RFE/RL 2021 |
| 6:22 | 1944 | AIR RAID | IAB |
| 6:27 | 1944 | STREET FIGHTING | IAB |
Abbreviations: en.wiki, ru.wiki, sr.wiki = Wikipedia in English, Russian, Serbian.