Around 14 — The first mention of Emona, a Roman garrison, on the territory of present-day Ljubljana.
1112–1125 — The first mention of Ljubljana Castle.
1144 — The first mention of Ljubljana by its German name Laibach.
1146 — The first mention of Ljubljana by the medieval name Luwigana.
1200 — City rights are granted to Ljubljana.
1243 — Ljubljana is first mentioned as a city.
1278 — Ljubljana comes under Hapsburg rule and is called Laibach.
1511 — The city is hit by a severe earthquake.
1693 — Foundation of Academia Operosorum, which brought together all the important scholars from the region of Carniola, and was modelled on the contemporary Italian academies.
1701 — Foundation of Academia Philharmonicorum. Its members included Haydn, Beethoven, Brahms and Paganini.
1809–1813 — Ljubljana becomes the capital of Illyrian Provinces. The first tree avenue is planted along the Ljubljanica river bank.
1810 — The Ljubljana Botanical Garden was established. The first governor-general of the Illyrian Provinces, Marshal Auguste de Marmont, attended the opening ceremony and planted a linden tree.
1821 — Ljubljana hosts the Congress of Holy Alliance, a coalition of countries that defeated Napoleon, which was attended by the most prominent European rulers.
1849 — The rail connection between Ljubljana and Vienna is established.
1895 — The city is hit by a devastating earthquake.
1919 — The University of Ljubljana is established.
1941–1942 — The illegal radio station ‘Radio Kričač’ () starts broadcasting.
1942 — The Italian occupying forces erect a barbed wire fence around Ljubljana.
1943 — German forces occupy Ljubljana.
1945 — Liberation: Ljubljana becomes the capital of the People’s Republic of Slovenia, part of the Federal People’s Republic of Yugoslavia, later Socialistic Republic of Slovenia within Socialist Federal Republic of Yugoslavia.
1991 — Ljubljana becomes the capital of the independent Republic of Slovenia.
2002 — The world’s oldest wheel, 5200 years old, is found at the Ljubljana Marshes.
2004 — Ljubljana holds a ceremony marking Slovenia’s accession to the European Union.
2010 — Ljubljana is named World Book Capital.
2011 — The remnants of pile-dwellings at the Ljubljana Marshes are entered on the UNESCO World Heritage list.
2014 — Ljubljana celebrates the 2000th anniversary of Emona.
2016 — Ljubljana is named European Green Capital 2016
2017 - Ljubljana towards circular economy