copula, expression
Archaic polite copula, more polite than です and である. Used in historical or highly formal contexts, often in period dramas or very formal letters.
See also: で御座います
これは私の家でござります。
This is my house. (archaic polite)
お名前は何とおっしゃいますか。わたくしは太郎でござります。
What is your name? I am Taro. (archaic polite)
Archaic polite form of である, using the humble auxiliary ござる (modern ございます). The exact historical derivation is uncertain, but it served as a highly formal copula in pre-modern Japanese.