By CBS3 Staff

PHILADELPHIA (CBS) – After two decades of planning and construction, the Philadelphia Art Museum has unveiled a major renovation. Celebrated architect Frank Gehry was part of a virtual press tour on Thursday.

Architect Frank Gehry

He and his team designed 90,000 square feet of space in the heart of the museum’s main building.

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Some of the space is new and some has been returned to public use for the first time in nearly 50 years.

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The new spaces and galleries open to the public on Friday.

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Tickets will be “pay as you wish” through Monday.