まぐさでわありませんでした
楣ではありませんでした
magusadewārimasendeshita

Noun
Desu Copula

The polite, past negative form of まぐさ

1. Was not a lintel.; Was not a transom.; Was not above the door.

Past/Perfective
Negative
Polite
Formal Register
Architecture
Usually Written in Kana