"Rome wasn't built in a day" comes from a legend:

The Romulus brothers were the sons of the God of War, and their mother Silvia was the descendant of the Trojan prince and the daughter of Numito, the king of Albalonga. Later, the throne was usurped by Numito's brother Amuro, who imprisoned Silvia. Later, the Romulus brothers were born, and Amuro threw them into the Tiber River.

Luckily, the Tiber River brought the two children to the shore, was discovered by a female wolf and fed them with milk, and was later discovered by a shepherd and brought home to raise them.

Later, when the two brothers grew up, the shepherd brought them to Numito, and told him about their life experiences. Numito accepted them. Later, the Romulus brothers gathered all the people who hated Amuro and launched a riot, which was successful.

The two brothers welcomed their grandfather back and decided to build a new city where the shepherd had found it. This was the beginning of Rome.

Later, during the construction process, the two brothers had an argument and refused to give way to each other, until it turned into a scuffle. In the chaos, the younger brother Lemos was killed, and Romulus became the king, and the newly-built city was named after himself, which is now Rome.

Later, when Romulus's grandfather Numito died, he passed his throne to Romulus, which added another strength to the Roman city. Later, the city gradually strengthened its strength and continued to expand outward. In just a few decades, the Roman city expanded several times and its population continued to increase, which also created conditions for the prosperity of the later Roman Empire.

Actually, the original text means "Rome was not built in a day", not "in a day", but "in a night".

Extended information:

The meaning of this famous saying:

It means that you can't rush to achieve something, only by making efforts and perseverance can you succeed.

Proverbs or idioms similar to "Rome wasn't built in a day":

1. Rome wasn't built in a day

Interpretation: It is a metaphor for the formation of a situation after a long period of accumulation and brewing.

sentence: Rome wasn't built in a day. Study harder and practice more diligently. Your hardworking will be rewarded by God. God is equal to everyone.

2. If you don't accumulate, you can't walk a thousand miles.

Interpretation: Walking a thousand miles is accumulated in half a step. Metaphor learning should be constant, don't give up halfway. ?

Sentence making: It's better to start with this "trust", and start a new mode of self-confidence in responsibility and trust.