As an opera singer, Hůlka has performed leading roles at the Estates Theatre, the Hudební divadlo Karlín where he also sang under the direction internationally acclaimed conductor Alexander Frey, the J. K. Tyl Theatre, the Liberec Theatre, the Městské divadlo Ústí nad Labem, and the Prague National Theatre.
Daniel Boone | Daniel Webster | Daniel Patrick Moynihan | Daniel Barenboim | Daniel Defoe | Daniel Amos | Daniel | Daniel O'Connell | Daniel Libeskind | Daniel Craig | Jack Daniel's | Daniel Radcliffe | Daniel Chester French | Daniel Boulud | Daniel Dennett | Daniel Day-Lewis | Daniel Collopy | Daniel Buren | Daniel Auber | Daniel Johnston | Daniel Ellsberg | Daniel Stern | Daniel O'Donnell | Daniel Burnham | Daniel Nestor | Daniel Henney | Daniel Boone (TV series) | Daniel Spoerri | Daniel Menche | Daniel Levitin |