Which religious publishing company's logo features an ancient symbol that represents the Trinity in Christianity?

Religious and philosophical symbols have been incorporated into many famous brand logos throughout history. Some companies deliberately use these symbols to evoke specific spiritual meanings or philosophical concepts, while others have unintentional connections. This trivia challenges your knowledge of where sacred symbolism meets corporate identity in the marketplace of faith-based and philosophical products.

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Zondervan, with its triangular trefoil knot design
Shambhala Publications, with its eight-spoked dharma wheel
Thomas Nelson, with its burning bush emblem
Ignatius Press, with its chi-rho monogram