The mosque will accommodate up to 2,000 people when finished
Intricate calligraphy, which forms the latest phase of work on Oxford's central mosque, will be unveiled later.
Scaffolding will be removed to reveal verses of the Koran which now decorate the main dome.
All the work carried out on the mosque, estimated to be in the region of £3.5m to £4m, has been funded by the local community.
When the mosque is completed, in a year's time, it will include a library, study rooms and a mortuary.
The calligraphy artwork, which took six months and cost £18,000, was carried out in Morocco before being transported to the UK.
Masoud Ahmed, Secretary of Oxford central mosque, said: "It's taken so long because we don't have a big cheque to pay for everything.
"The majority of the funds collected have been from working-class people and businesses and that's the proud bit, that the local community has raised this money."