Gruber Canal, Canal and cultural heritage in Ljubljana, Slovenia.

Gruber Canal is a water channel running through Ljubljana's eastern section, connecting barriers near Roče road to the Ljubljanica River. The waterway follows its original path while serving modern needs of the city.

Gabriel Gruber, a Jesuit planner tasked by the Vienna government with draining the Ljubljana marshes, designed the canal to divert flood water from the Ljubljanica around the castle hill. Work began in 1772; Gruber left Ljubljana in 1777 after 465 metres, and engineer Vincenc Struppi completed it. Water first flowed on 25 November 1780, and the channel was deepened in 1829.

The canal carries the name of the Jesuit Gabriel Gruber, who was tasked by the Vienna government with draining the Ljubljana marshes. The street beside the Karlovški Bridge is now called Gruberjevo nabrežje. Near that bridge stands a truncated pyramid monument with Latin inscriptions on its sides, erected when the channel was deepened in 1829.

The canal runs through the narrow passage between Ljubljana Castle and Golovec hill, crossed by ten bridges, from Hladnikova brv na Špici to Brv ob sotočju. The Karlovški most and Gruberjeva brv give the closest views of the regulating gates at the canal entrance. The street along Karlovški most is now called Gruberjevo nabrežje.

The canal was dug only 465 metres under Gruber before he left Ljubljana almost secretly in 1777 over financial troubles; engineer Vincenc Struppi finished the work, and water first ran through on 25 November 1780. A truncated-pyramid monument with Latin inscriptions stands by the Karlovški most, and the street along it is now Gruberjevo nabrežje.