The only discordant element in this material repository is a very rough hemispherical metal room by the artificial lake.
There is a copper plate on the door of the room, with ornate lettering: Magic Experiment Field.
From the traces on the ground, the lettering on the copper plate, and the style of the building, Angel is quite certain that this Magic Experiment Field was later added by Tizarro himself.
Tizarro doesn't need such a large material repository, but a Magic Experiment Field is absolutely necessary.
Angel wandered around the material repository, and apart from the Magic Experiment Field, he personally quite likes this material repository.
So many ecological zones are carefully considered for the preservation of materials. Angel even suspects that the original owner of these ruins, the initial builder, might have been an Alchemist himself, otherwise why would he need such a large material repository?