Good design doesn't date.
After World War II great strides were made in modern Japanese architecture, not only in advanced technology, allowing earthquake resistant tall buildings, but expressing and infusing characteristics of traditional Japanese architecture in modern buildings.
After about the first Millennium, Italy was the cradle of Romanesque architecture, which spread throughout Europe, much of it extending the structural daring with minimal visual elaboration.
The Romans were not inventors of the supporting arch, but its extended use in vaults and intersecting barrel shapes and domes is theirs.
Architecture is not an inspirational business, it's a rational procedure to do sensible and hopefully beautiful things that's all.