Work has been underway for some time to repair the roof and to renew the pointing of the stonework on the Cathedral.
Now that the walls have had time to dry out, the interior surfaces, which were badly affected by damp, are about to be cleaned and repainted.
Liturgies for the duration of the closure will be celebrated in Nazareth Chapel, Church Hill, Sligo.
The Jubilee Year Cross will move temporarily to St Anne’s Church, Sligo.
The Adoration Chapel at the Cathedral will remain open during this time and the Cathedral car park will be operational.