Ongoing

Michelangelo’s Sistine Chapel: The Exhibition

CambridgeSide 100 Cambridgeside Pl., Cambridge

Walk beneath life-size reproductions of the Sistine Chapel ceiling. Every brushstroke, every detail — just feet away.

Foundry Festival

The Foundry 101 Rogers St., Cambridge

The fourth annual Foundry Festival brings a week of free public programming for all ages and skill levels in a variety of art, culture, and community activities.

Valentine’s Day book swap

Harvard Book Store 1256 Massachusetts Ave., Cambridge

Stop in, browse the shelves and buy a book or books for a partner or friend in secret. Reunite and reveal each other's book picks and why you chose that book for them. Participants will get a coupon at check-in for 20 percent off the purchase. There...

Valentine’s Day Adult Night

Lego Discovery Center 598 Assembly Row, Somerville

There’s a themed building competition and challenges, pictures with a Lego Character and prizes.

$20