Architecture In Helsinki - Souvenirs

With an envelope,
We'll enter buildings we might touch,
I've got souvenirs but yesterday can't mean too much,
Have we missed an opportunity?

Whispers Chinese leaves a message, leaves a metaphor,
For what once was gold and once was rich and now is poor,
Have we missed an opportunity?
And the trees lean to lend,
Can I fold you in fourteen ways to depend not defend?