The answer is: Two cherubim

Exo 25:18

The Ark of the Covenant, one of the most sacred objects in ancient Israelite culture, wasn't just a box— it was a symbol of the divine presence among the people. Sitting atop the Ark were the two cherubim, essentially angelic creatures, facing each other with their outstretched wings forming a sacred space known as the "Mercy Seat." This spot is where it was believed God's presence would manifest; it’s like the most exclusive VIP area where heaven met earth!

Interesting trivia: The cherubim’s depiction goes beyond mere decoration; they carry profound meaning. In biblical literature, cherubim often represent guardianship and divine protection, appearing in other key contexts, such as in the Garden of Eden, where they guarded the tree of life. The artistry of the cherubim on top of the Ark was intricate, possibly symbolizing a bridge between the spiritual and physical realms.

Moreover, the Ark itself traveled with the Israelites during their 40-year trek in the wilderness, and it was placed in the innermost chamber of the Tabernacle: the Holy of Holies. This area was restricted to only those deemed pure enough, emphasizing sacredness in communal and spiritual matters.

So, next time you think about the Ark of the Covenant, remember it wasn’t just a treasure box—it was a powerhouse of holiness featuring heavenly beings whose very nature echoed the preservation of divine order amongst people seeking connection with the divine.