Why Was the Temple of Artemis at Ephesus Considered Amazing?

On July 21, 356 BC, Herostratus sets fire to the Temple of Artemis in Ephesus, one of the Seven Wonders of the World in order to achieve lasting fame. He was sentenced to death and his name was not to ever be spoken under penalty of death. An excerpt from the article:

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For 200 years, the Temple of Artemis was revered. Pilgrims would travel long distances to see the Temple. Many visitors would make generous donations to the goddess to earn her favor. Vendors would make idols of her likeness and sell them near the Temple. The city of Ephesus, already a successful port city, soon became wealthy from the tourism brought in by the Temple as well.

Then, on July 21, 356 BCE, a madman named Herostratus set fire to the magnificent building, with the sole purpose of wanting to be remembered throughout history. The Temple of Artemis burned down. The Ephesians and nearly the entire ancient world were stupefied at such a brazen, sacrilegious act.

So that such an evil act would not make Herostratus famous, the Ephesians banned anyone from speaking his name, with the punishment being death. Despite their best efforts, Herostratus' name has gone down in history and is still remembered more than 2,300 years later.

Legend has it that Artemis was too busy to stop Herostratus from burning down her temple because she was helping with the birth of Alexander the Great that day."