罗马建筑以其拱门和穹顶闻名。

___Roman architecture is famous for its arches and domes.

他正在写一部关于古代历史的长篇小说。

He is writing a historical ___novel about ancient times.

正文部分使用罗马字体，标题部分用斜体。

Use ___Roman font for the main text and italics for headings.