jemandem ans Herz gewachsen sein #idiom (Podcast S02E03)

Today, we talk about the German idiom “jemandem ans Herz gewachsen sein”. What does “jemandem ans Herz gewachsen sein” mean?
to be dear to sb.’s heartIdiomHyphenationje·man·dem ans Herz ge·wach·sen sein
Meaning[1] s.o. likes something very much, feels affection for something
Example[1] His children are very dear to his heart.
(Source: Wiktionary)
Personal Remarks heart as the seat of feelings people have become, so to speak, a part of one’s own heart can be people, but also cities, objects, etc.