Or are there specifically five symbols on each wall? Maybe it's like a phrase made up of two sentences with related meanings?
In general, to create a meaningful sentence (or two), we need certain parts of speech.
For example, for two sentences:
2 verbs
1 preposition
4-5 nouns
2-3 adjectives
I think 5, 6, and 8 are definitely nouns, 3 is {obviously} a preposition, 1 and 7 could be verbs, and 4 and 9 are adjectives, like "dead."
By the way, it's not a heart, but a "heart crypt."
I would say that the hourglass represents the "crypt," because the sand is falling, but it doesn't quite fit with the word "hour."
Does anyone know what role flowers play in ancient Halehidian culture?

В тихой однообразной жизни всегда так бывает: каждый отдельный день бесконечно долог, но месяцы и годы мчатся с непостижимой быстротой.
I wanted to offer you some flowers, but a crown would suit a princess like you much better
Смысл жизни в том, что жизнь на тебе не заканчивается