The project was an architect’s dream and a potential nightmare: Design a tripartite worship space — to include a Catholic church, a synagogue and a mosque — in the heart of the conflict-ridden Middle East, in order to promote tolerance and at the same time reflect the three great Abrahamic faiths, which are so often at loggerheads.

For Sir David Adjaye, a star architect who designed the $540 million National Museum of African American History and Culture on the National Mall in Washington, the challenge was amplified by the fact that until 2018, when he designed an interdenominational cathedral in Accra, Ghana, he had never built anything religious-themed.

“So I had to dive straight into it all to get up to speed,” Mr. Adjaye told Religion News Service before the unveiling of his winning design on Sept. 20 at the New York Public Library in Manhattan.

Even so, the architect is not unfamiliar with religion, nor with the tension of multifaith con- texts. Mr. Adjaye, a youthful 53-year-old Briton who received a knighthood in 2017 for his work, won the competition to make this location a reality. Born in Tanzania of Ghanaian parents, Mr. Adjaye was raised as a Christian and grew up in the multiethnic, multireligious world of Tanzania. He also became familiar with life in Central and West Africa and the Middle East before moving to Europe as a young man.

“I was really inspired by all that,” Mr. Adjaye said. “I’ve really understood southern Christianity and northern Christianity, Judaism and Islam, and throw in there the Sikh religion, which is big in East Africa, and Hinduism. I was exposed to those cultures very early in my upbringing. So I feel like I have a sensitivity. But,” he added, with a smile, “that doesn’t make me an expert on the building.”

The United Arab Emirates project, dubbed the Abrahamic Family House, was only put out for competition a few months ago, following the signing last February of the Document of Human Fraternity for World Peace by Pope Francis and the Grand Imam Ahmed El-Tayeb, the top religious leader in Sunni Islam.

The document was signed in the United Arab Emirates, which has long promoted itself as a beacon

of religious tolerance in the Arab world and the wider Middle East. The UAE wanted to follow up quickly with a concrete manifestation of the high- concept Human Fraternity document: A complex that would rise on Saadiyat Island, the cultural heart of Abu Dhabi, capital of the UAE.

“My view is that every family reunion needs a great location, and right now we don’t have anywhere to go for a great family reunion,” said Rabbi Yehuda Sarna, a New York-based rabbi who last March was installed as the first chief rabbi of the Jewish community of the UAE. “The idea of doing this in the Middle East, in an Arabic country, in the context of the exodus of Jews and Christians from many Arab lands, is in my opinion a real sign of leadership.”

The Abrahamic Family House actually will be three distinct houses of worship — a Catholic church, a synagogue and a mosque. Rather than trying to meld the religions into one architectural concept, something critics of the entire initiative feared, Mr. Adjaye insisted on making them distinct yet interrelated, which is also a goal of the Human Fraternity project.

“I think that’s why I won!” he said. “I was compelled by the opportunity to show the relationship between all three.”

Mr. Adjaye said he is “very obsessed with geographic specificity” and is planning to use stone and materials from the region in the construction. The three buildings will all have the same footprint — the exact size and capacity are still to be determined — and structure and will be connected by a shared garden and plaza.

But they each will have a layout and design that follows the specific religious requirements and traditions of each faith. The apse of the church will have a sculpture with spokes of light that echo the great Baroque apse of St. Peter’s Basilica in Rome representing the Holy Spirit.

“It’s a great piece of art and a great inspiration,” Mr. Adjaye said.

The synagogue is designed to mimic a sukkah, a tent or booth that Jews erect outside during the fall holiday of Sukkot. A sukkah is designed to recall the temporary dwellings the Israelites used during their 40 years in the wilderness following the Exodus from Egypt.

“I’ve designed the synagogue as sort of a permanent sukkah, to talk about the fragility of the religion, the fragility of life,” he said.

The simple square floor plan of each of the buildings evokes the Kaaba, the cube-shaped shrine near the Grand Mosque in Mecca, Is- lam’s holiest site in its holiest city. The UAE mosque itself will have soaring arches in each wall — traditional architectural features of mosques — but the arches are elongated to let in more light than most mosques.

“There’s nothing about these three spaces that is repeating something,” Mr. Adjaye said. “It’s going to be learning about what all three are, but moving them into the 21st century.”

These houses of worship also are designed to be used, not just admired. Thanks largely to an influx of migrant workers, the majority-Muslim UAE, with a population of about 8 million, is also home to hundreds of thousands of Chris- tians, as well as an active Jewish community that numbers about 3,000.

The timeline for the project is as ambitious as the concept. The Abrahamic Family House is scheduled to open in 2022.

“More broadly, the big challenge is not about building this building,” Rabbi Sarna said. “It’s not about building a house. It’s building a home. There are so many huge and glitzy buildings around the Middle East. This is the start of a century-long task of building a home.”