| 1878 | appointment Muziekschool Maatschappij tot bevordering der Toonkunst |
| first Soirée for Chamber Music in Felix Meritis |
| 1879 | engagement to Amanda Maier |
| 1880 | marriage to Amanda Maier in Landskrona (Sweden) |
| 1881 | birth first son, Julius |
| first performance with Johannes Messchaert |
| 1883 | plays Brahms' Second piano concerto in Amsterdam |
| December 1883 | first visit Grieg to The Netherlands, start of a long friendship |
| 1884-1886 | conductor vocal society Excelsior |
| 1884 | co-founder Amsterdam Conservatory |
| 1886 | birth second son, Engelbert |
| 1886-1888 | managing director Felix Meritis |
| 1886-1898 | conductor Toonkunst Amsterdam |
| 1888 | - 11 April: inauguration Concertgebouw |
| - 14 April: last concert Felix Meritis conducted by Julius Röntgen |
| - 21 April: First concert with Toonkunst in Concertgebouw: |
| Beethovens Missa Solemnis |
| juli 1884 | first visit to Norway |
| 1889 | start of long series song recitals with Johannes Messchaert |
| 1891 | - 25 April: conducts Bach's St. Matthew Passion |
| - 19 December: conducts first performance in Holland of Bach's Hohe Messe |
| - August: travels to Norway; meeting with Grieg and Frants Beyer |
| Summer 1892 | first sojourn at Fuglsang |
| 1894 | Amanda Maier dies |
| 1895 | Mengelberg conductor Concertgebouw Orchestra |
| 1897 | - Grieg conducts Concertgebouw Orchestra |
| - second marriage to Abrahamine des Amorie van der Hoeven |
| - Grieg visits Röntgen |
| 1898 | - first international tour Concertgebouw Orchestra, Music Fest Bergen, by invitation of Grieg |
| 1898 | - resigns as conductor Toonkunst |
| - birth third son, Johannes |
| 1899 | - birth daughter Amanda |
| 1900 | - move to the Van Eeghenstraat |
| 1900-1914 | - international concert trips, with Messchaert, Casals, Flesch, etc. |
| 1902 | - First Dutch Music Fest, with performances of works by Julius Röntgen |
| - birth fourth son, Edvard Frants |
| - first meeting with Pablo Casals |
| - performs Beethovens's Fourth piano concerto in Vienna |
| 1903 | - conducts Concertgebouw Orchestra with own works, in celebration of 25th anniversary in Amsterdam |
| 1904 | - birth fifth son, Frants Edvard |
| - death Amanda Röntgen |
| Summer 1904 | - Fuglsang, start friendship with Carl Nielsen |
| 1906 | - birth sixth son, Joachim |
| - Grieg visits Röntgen |
| - first Flesch-Röntgen evening Kleine Zaal Concertgebouw |
| 1907 | - concerts with Grieg in Oslo |
| - concerts with Casals in Paris |
| - last visit to Grieg in Troldhaugen, with Percy Grainger |
| - death Grieg |
| - management musical inheritance Grieg |
| 1910 | - first concert Percy Grainger in Amsterdam, at instigation of Röntgen |
| 1911 | - conducts Third symphony in Concertgebouw |
| - conducts Second cello concerto Concertgebouw, with Casals as soloist |
| 1912 | - Second Dutch Music Fest with performances of work by Röntgen |
| - Carl Nielsen conducts his Third Symphony at the Concertgebouw, at instigation of Röntgen |
| 1912-1918 | - regular performances with Röntgen Trio (with both eldest sons) |
| 1913-1924 | - managing director Amsterdam Conservatory |
| 1913 | - opera 'Agnete', Netherlands Opera Society |
| 1917 | - attends to edition correspondence Brahms-Engelmann |
| 1918 | - meets Kees Boeke |
| 1919 | - assumes Dutch nationality |
| from 1921 onwards | - samenwerking met D. van der Ven: vier folkloristiche films met muziek van Röntgen |
| 1922 | - 22 August: Last meeting with Messchaert |
| - 10 september: death Messchaert |
Julius Röntgen 3 years old
Moritz Hauptmann
Franz Liszt
Amanda Maier
Julius Stockhausen
Johannes Brahms
Edvard Grieg
Felix Meritis
Amanda Maier
Julius Röntgen with his wife Margaret Otter and his daughter Agnes.
Johannes Messchaert
Fuglsang, Denemarken
Willem Mengelberg
Het Concertgebouw in Amsterdam, ca. 1900
Villa Gaudeamus under construction, 1924
Villa Gaudeamus finished, 1925
Architect Frants Röntgen
De lachende Cavalier (Frans Hals, 1624), opera van Julius Röntgen
Eredoctoraat Universiteit van Edinburgh, 1930
De Spaanse cellist Pablo Casals
Julius Röntgen, 1932