Rome wasn't built in a day
roʊːm ʋaːr ɛhɟɪ reɪsd aʊː eɪːnym deɪːjɪ
In Icelandic Róm var ekki reist á einum degi
This idiom is used in Icelandic to emphasize that large projects take time and effort.
Example
"Ekki örvænta, Róm var ekki reist á einum degi."
