He is born on the 15 of May, in Pitaru (Dambovitza County), the sixth son of Ion and Ruxandra Grigorescu.
His father, Ion Grigorescu, dies and the whole family goes to live in Bucharest.
Nicolae becomes apprentice of Anton Chladek, an icons' painter.
Paints the church from Baicoi.
Paints some icons for the Caldarusani Monastery.
Presents one of his historic paintings to prince Barbu Stirbei. His application for a scholarship abroad is rejected by the regent Alexandru Dimitrie Ghica.
Paints the church of Zamfira Convent.
Participates to a contest for a scholarship in Italy, won by C.I.Stanceascu, his future colleague from Paris.
Paints the church of Agapia Convent.
He obtains a scholarship, with Mihail Kogalniceanu's help, to Paris. Paints the church from Puchenii Mari.
Works in his workshop in Paris, 23, Rue du Cherche-Midi.
Works at Louvre Museum, making copies of the paintings of the world's greatest artists.
Comes back to Romania for a documentation journey.
Paricipates at the Universal Exhibition in Paris with six paintings. Comes back to Romania and works at Caldarusani, Targoviste, Campulung and Rucar.
Participates at the Barbizon painters' exhibition. Napoleon III buys one of his painings. Exhibits for the first time at Salon de Paris.
Exhibits 26 paintings at the alive artists' exhibition. He wins the gold medal for the "Portrait of the boyar Nasturel Herescu". Paints few more portraits ("Dimitrie Grecescu",doctor Alexandru Marcovici").
Participates at the opening of the first exhibition under the patronage of the Society of Fine-Arts Friends with 148 paintings. Participates at the Universal Exhibition in Wien.
Starts a two years tour through Wien, Trieste, Venice, Rome, Neaples, Athens, Constantinople.
Participates at the third edition of the exhibition initiated by the Society of the Fine-Arts Friends with paintings with rustic theme.
Organizes a big personal exhibition and participates at the alive artists exhibition with "The Foot Soldier".
Journey in France, in Bretagne and the environs of Paris. Paints a lot of sea landscapes.
Participates at the Universal Exhibition in Paris and at the Romanian Atheneum. Personal exhibition at the Romanian Atheneum will follow in 1891, 1895, 1897, 1902, 1905.
He gets sick and goes to Karlsbad for a cure.
Chooses the paintings for the General Exhibition.
He dies at Campina, without finishing the painting "Coming back from fair".