If Antwerp’s Mode Museum (MoMu) is desperately seeking a second storage space for its growing permanent collection, at least part of the blame falls on Bernard Willhelm. He may donate his designs each season alongside the likes of Dries van Noten, Martin Margiela, and his onetime mentor Walter van Beirendonck, but inside the museum’s existing archive rooms — which Sight Unseen had the exclusive privilege of touring earlier this year — it’s Willhelm who clearly holds the record for overflowing racks. In fact, MoMu’s curation team rarely turns down a donation from a legitimate source, whether for the historical collection it originally inherited from an old provincial textile museum or for its cache of contemporary fashions by talents born or educated in Antwerp, but Willhelm’s contributions are so generous that the day we visited, there were clothes waiting to be graciously returned to his showroom. It’s not difficult to understand the designer’s enthusiasm, though, or that of his peers: The MoMu’s prestige in Europe far exceeds its diminutive size, and since it opened a decade ago, it’s become the largest repository in the world for contemporary Belgian fashion.