Dagobert, the king of the Franks (reigned 628 to 637), refounded the church as the Abbey of Saint Denis, a Benedictine monastery.
Dagobert also commissioned a new shrine to house the saint's remains, which was created by his chief councillor, Eligius, a goldsmith by training.
An early vita of Saint Eligius describes the shrine:
Above all, Eligius fabricated a mausoleum for the holy martyr Denis in the city of Paris with a wonderful marble ciborium over it marvelously decorated with gold and gems.
He composed a crest [at the top of a tomb] and a magnificent frontal and surrounded the throne of the altar with golden axes in a circle.
He placed golden apples there, round and jeweled.
He made a pulpit and a gate of silver and a roof for the throne of the altar on silver axes.
He made a covering in the place before the tomb and fabricated an outside altar at the feet of the holy martyr.
So much industry did he lavish there, at the king's request, and poured out so much that scarcely a single ornament was left in Gaul and it is the greatest wonder of all to this very day.

None of this work survives.
Dagobert, the king of the Franks (reigned 628 to 637), refounded the church as the Abbey of Saint Denis, a Benedictine monastery. Dagobert also commissioned a new shrine to house the saint's remains, which was created by his chief councillor, Eligius, a goldsmith by training. An early vita of Saint Eligius describes the shrine:
Above all, Eligius fabricated a mausoleum for the holy martyr Denis in the city of Paris with a wonderful marble ciborium over it marvelously decorated with gold and gems. He composed a crest [at the top of a tomb] and a magnificent frontal and surrounded the throne of the altar with golden axes in a circle. He placed golden apples there, round and jeweled. He made a pulpit and a gate of silver and a roof for the throne of the altar on silver axes. He made a covering in the place before the tomb and fabricated an outside altar at the feet of the holy martyr. So much industry did he lavish there, at the king's request, and poured out so much that scarcely a single ornament was left in Gaul and it is the greatest wonder of all to this very day.
None of this work survives.
Basilica of Saint-Denis