Vojtěch Ignác Ullmann (23 April 1822 in Prague – 17 September 1897 in Příbram)[1] was a Czech architect working in Revivalism architecture, particularly Renaissance Revival architecture.

Ullmann studied architecture at the Academy of Fine Arts in Vienna with professors August Sicard von Sicardsburg and Eduard van der Nüll.

He often collaborated with the architect Antonín Viktor Barvitius, whose sister he married in 1856.

In Ullmann's early work we see echoes of medieval stylistic elements (see the Church of Saints Cyril and Methodius in Prague 8 - Karlín).

In the next phase of his work, he was significantly influenced by the Viennese renaissance school.