South Station Tower officially made its debut last week as the newest skyscraper in downtown Boston.

The building that was envisioned decades ago features a redesigned bus terminal , office space and luxury condos.

"South Station Tower is going to bring even more families, more businesses and more visitors downtown," Mayor Michelle Wu said at Thursday's unveiling. "This building is a testament to our city's mission, making Boston a home for everyone."

Here's what to know about the $1.5 billion project.

How tall is South Station Tower?

The tower is 51 stories tall and rises 690 feet above Boston. For comparison, the John Hancock Tower at 200 Clarendon St. is 790 feet high and The Prudential Tower is 750 feet.

The condos at the top of South Station tower boast "unsurpassed pano

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