How did the rise of Christianity affect ancient Egyptian religion and hieroglyphic writing?

The rise of Christianity in Egypt during the 2nd and 3rd centuries CE profoundly altered the cultural landscape, leading to the decline and eventual disappearance of both ancient Egyptian polytheism and hieroglyphic writing.12

As Christianity gained influence, it actively opposed traditional Egyptian religious practices. This shift favored the use of the Greek alphabet, which Egyptian Christians adopted to write their spoken language. To accommodate sounds unique to the Egyptian language, they expanded the Greek script with seven additional characters, creating what is known as Coptic.13

This transition caused a widespread decline in the knowledge of the native hieroglyphic system, which had remained virtually unchanged for over 2,000 years. As the new religion and its associated script became dominant, the use of hieroglyphs faded; the last known datable inscription in the system is a graffito from the island of Philae dated August 24, 394 CE. While some traditional religious institutions persisted for a time, the official prohibition of polytheistic practices in 391 CE further accelerated the abandonment of the ancient script.213