| 1857 - Mr. Anthony Petrof, founder of PETROF firm moved to Vienna, where he took classes about the construction of pianos. |
| 1864 - Hradec Králové - construction of the first concert piano. |
| 1865 - Mr. Anthony Petrof changed father's workshop to piano works. |
| 1874 - The company moves to a location behind town - direction to Brno. |
| 1881 - Opening of the piano-board own production and construction of mechanics. |
| 1884 - Manufacture of own saw. |
| 1894 - Start to export instruments abroad. |
| 1895 - Opening of branch in Temesvar in Hungary. |
| 1908 - Transformation of the Company into trading corporation. There are as well employed by founder Mr. Anthony Petrof his sons Jack, Anthony and from the year 1914 also the youngest son Vladimír (II. generation) |
| 1915 - Anthony Petrof and his wife - authorized agent of the company died. |
| 1928 - The Company PETROF in conjunction with significant American company STEINWAY - opening of the branch on Wigmore Street in London. |
