The project team behind "Old Port Square" in Portland unveiled plans Tuesday for what would be the tallest building in Maine. After a decade of collaboration, East Brown Cow and Sadfie Architects shared their vision for revitalizing the downtown area with a new 380-foot-tall building and several new renovations in a 4-acre area of Middle, Exchange, Fore and Union Streets in Portland. Architects are hoping to create a new urban heart in Portland while also honoring the city's history, culture and existing architecture. "Old Port Square" would feature new retail spaces, hotels, restaurants, offices, residences, parking and outdoor community spaces. Looming over "Old Port Square" would be a new 30-story tower at 45 Union St. that would feature a publicly accessible "sky lobby" and restaurant with 360-degree views of the city and Casco Bay. "The project's breakthrough was the day we latched onto the idea that this is a beacon," said Moshe Safdie, Safdie Architects’ Founding Partner. "It's a lighthouse in the tradition of the lighthouses of Portland, those slender, beautiful structures that rise out of the land or out of the water, that become icons in the landscape for good purpose."The design unveiling follows the city's adoption of a new land use code, known as "Recode" in November 2024, which, among other changes raises the maximum height on new construction in downtown Portland. The project still needs to be approved by Portland's Planning and Urban Development department, but if approved, the project team hopes to break ground in 2027.