Which religious symbol was deliberately redesigned in the 4th century CE by Emperor Constantine to help market Christianity to both pagans and Christians as part of his imperial unification strategy?

Throughout history, religious organizations have utilized symbols and visual elements to create recognizable 'brand identities' that communicate their values and beliefs. Just like modern companies invest in their brand identity, religious institutions have carefully developed and evolved their visual languages over centuries. This poll tests your knowledge about a fascinating product development moment in religious brand identity that had significant historical implications.

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The Chi Rho monogram, combining Greek letters to represent Christ while resembling a solar symbol familiar to pagans
The Ichthys (fish symbol), modified to include a hidden cross within its design
The Latin Cross, elongated from its original equal-armed Greek form to appeal to Roman military aesthetics
The Alpha and Omega symbols, repositioned to frame a solar disc similar to those in pagan worship