However , the space has been greatly extended with a number of lateral and transept chapels added between 1350 and 1400 .
The Lower Church was built entirely in the Romanesque style , having a low semi-circular ribbed cross-vaults over the nave and barrel vaults over the transept arms .
The space has been greatly extended with a number of lateral and transept chapels added between 1350 and 1400 .
The Lower Church was built entirely in the Romanesque style , having a low semi-circular ribbed cross-vaults over the nave and barrel vaults over the transept arms .