First bring in a mass family from the library.
How to make a dome roof in revit.
Autodesk revit out of the box has an array of different primitive shapes including dome.
Please like this video.
2 for glazed domes.
In this video i show you how to model two types.
For the onion shaped dome start by using the model line tool to trace the shape from a photograph.
For glazed domes based on curtain walls only the second does.
For both domes create an in place family by choosing component model in place and then choosing roofs in the family category dialog box.
Get this revit file here.
After placing the mass an elevation view is needed to adjust the shape of the dome to the desired roof dimensions being careful not to make the roof too steep.
This video shows how to create two types of domes as in place roofs in revit.