Now that the flames have died down after the devastating fire at Paris’s Notre Dame cathedral, investigators and are getting their first glimpses to assess the damage done. The spire and roof are gone, but many artifacts of the centuries-old cathedral appear to have survived.

The AP reports that the twin bell towers remain intact as does the cathedral’s massive pipe organ. CNN noted that the massive stained-glass rose windows also survived. A fire-brigade chaplain reportedly saved the prized Crown of Thorns relic.

Investigators, still waiting to make an overall assessment on structural integrity, are studying how much the intense heat affected the stone structure.

Here are some of the glimpses inside Notre Dame after the blaze, as well as a look at rescued treasures:

Christophe Petit Tesson/Pool via Reuters
A interior view of Notre Dame’s ceiling.
Christophe Petit Tesson/Pool via Reuters
A view of the debris inside Notre Dame.
Ludovic Marin/AFP/Getty Images
Charred debris inside Notre Dame cathedral on April 16.
Reuters/Philippe Wojazer/Pool
Smoke rises around the altar in front of the cross inside the cathedral on April 16.
Dan Kitwood/Getty Images
A burnt-out window at Notre Dame.
Reuters/Benoit Tessier
Salvaged treasures from the cathedral, now in a room at Paris city hall, on April 16.
France Televisions via AP
An image taken from France Television video shows the damage inside Notre Dame on April 15.
Philippe Wojazer/AFP/Getty Images
A view from the entrance shows smoke rising in front of the altar cross on April 15.
Reuters/Philippe Wojazer/Pool
Flames and smoke are seen as the interior continues to burn inside Notre Dame on April 16.