Famed architect Santiago Calatrava will be in New York City today to celebrate the topping out ceremony of the reconstructed Saint Nicholas National Shrine at the World Trade Center. The Archbishop Demetrios of America, members of the Greek Orthodox Church and Calatrava’s project team will also be on hand for the celebration, which will see the installation of a temporary cross placed on the building’s highest point, marking a major milestone in the construction process.

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The ceremony, which will be held at the Saint Nicholas construction site at Liberty Park on the corner of Greenwich and Liberty streets, will lift a temporary cross onto the church dome. Led by Archbishop Demetrios of America, the event is principally an opportunity to thank the project’s construction team and various workers that have helped in the building process. Prayers for the ongoing construction process will also mark the day’s activities.

Related: Santiago Calatrava Breaks Ground on Saint Nicholas National Shrine With ‘Ground Blessing’ Ceremony

The church, which dates back to 1916, was completely destroyed during the 9/11 terrorist attacks when the South Tower of the World Trade Center collapsed. Once construction is completed, the temporary cross will be replaced with a permanent one that will serve as a welcoming beacon for all churchgoers.

+ Santiago Calatrava

+ Saint Nicholas National Shrine

Images via Santiago Calatrava and Saint Nicholas National Shrine