Refers to a rounded roof structure, such as a dome or cupola, in architecture.
The church's dome was visible from afar.
This building is characterized by its vaulted roof.
ドーム is a loanword from English 'dome' and is more common in modern contexts, while 丸屋根 is a native Japanese compound with a more traditional or descriptive feel.
屋根 means 'roof' in general, while 丸屋根 specifically refers to a rounded or domed roof.
Standard kanji spelling using 丸 (round).
Alternate spelling using 円 (circle/round); less common than 丸屋根.
Compound of 丸 (まる, 'round') + 屋根 (やね, 'roof'). The alternate kanji 円 also means 'round' or 'circle'.