He is the patron of a number of places in south-western France, notably Saint-Lizier, which he is said to have saved from the Vandals.

Lycerius is also linked with Lleida (Lérida) in Catalonia, where there is a tradition (undocumented) of a bishop of the same name in the 3rd century.

It is not clear to what extent the Catalan traditions reflect a confusion between two separate individuals, if indeed there is any foundation to them.

On account of the sanctity of his life, he was elected bishop of Couserans, and also administered the diocese of Tarbes during its vacancy from 506 to 541.

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