Fabritius was born on July 2, 1842 in Vyborg, died on October 8, 1899 in Lappträsk.

Fabritius studied music in Leipzig from 1857 to 1861 and then worked successfully for a few years as a violinist in concerts in both Finland and Stockholm. In 1864, due to a hand injury, he had to stop performing in concerts, but continued to compose. Fabritius’ compositions include orchestral overture by Maria Stuart, violin concerto in 1877 (also appeared as a piano arrangement), choral and orchestral works such as a cantata for choir, and violin, vocal and piano compositions.

He also worked as a farmer, journalist and horse breeder.