PORTLAND’S TATE HOUSE, built in 1755, is the only pre-Revolutionary War home in the city open to the public. On the first and third Thursdays of each month, through early October, visitors can take a 90-minute tour exploring the historic home’s architecture from the base of its huge center chimney to the rafters in the attic. Go to www.tatehouse.org for information.

WHEN: 10 and 11:30 a.m. and 1 and 2:30 p.m. tours

WHERE: Tate House Museum, 1270 Westbrook St., Portland

HOW MUCH:

$8; $6 for seniors; $3 for children ages 6 to 12