After the Avar invasion of lower Moesia in the 6th century, Dasius's remains were transferred to Ancona.
They now rest in a marble sarcophagus kept in the Museo Diocesiano next to Ancona Cathedral.

Veneration of the saint was widespread during the 5th to 7th centuries.
 His feast day is 20 November.

In the Martyrologium Hieronymianum (written c. 600), Dasius's name is also recorded (under 5 August) as Bassus, Dassus, Taxius an Dasus, with various feast days, among others 5 August in Irakleio, Attica, 21 December in Axiopolis (Cernavodă) in Moesia and 20 October in Puteoli (Pozzuoli).

The oldest known icon of the saint is in the Menologion of Basil II (late 10th or early 11th century), under the date of 20 November.

On the occasion of his visit to Bulgaria in 2002, John Paul II donated the right humerus of Dasius, taken from the Ancona relics, to the church of Silistra.
The bone was presented in a small marble chest made to look similar to the Ancona sarcophagus.
After the Avar invasion of lower Moesia in the 6th century, Dasius's remains were transferred to Ancona. They now rest in a marble sarcophagus kept in the Museo Diocesiano next to Ancona Cathedral. 
Veneration of the saint was widespread during the 5th to 7th centuries.  His feast day is 20 November. 
In the Martyrologium Hieronymianum (written c. 600), Dasius's name is also recorded (under 5 August) as Bassus, Dassus, Taxius an Dasus, with various feast days, among others 5 August in Irakleio, Attica, 21 December in Axiopolis (Cernavodă) in Moesia and 20 October in Puteoli (Pozzuoli).
The oldest known icon of the saint is in the Menologion of Basil II (late 10th or early 11th century), under the date of 20 November.
On the occasion of his visit to Bulgaria in 2002, John Paul II donated the right humerus of Dasius, taken from the Ancona relics, to the church of Silistra. The bone was presented in a small marble chest made to look similar to the Ancona sarcophagus.
Dasius of Durostorum