St. Mary Coptic Orthodox Church is a special building where people who believe in something called Coptic Orthodox Christianity go to pray and worship. It's located in Los Angeles, which is a big city in California.
Coptic Orthodox Christianity is a type of Christianity that started a long time ago in a place called Egypt. The people who believe in this religion think that Jesus is really special, and they follow certain rules and traditions to show their respect for him.
When you go to St. Mary's Church, you'll see a lot of people wearing fancy clothes and singing songs in a language called Coptic. They'll also light candles and say prayers together.
The church is very big and has different rooms where people can do different things. Some rooms are for meetings and classes, while others are for special ceremonies. There's also a big outdoor area where people can have picnics and hang out together.
St. Mary's Church is really important to the people who believe in Coptic Orthodox Christianity because it's a place where they can connect with their community and worship God.