I don't think I had ever heard the word "sesquicentennial" until this year. Because it is Boise's. The city has opened a shop for the year to hold events , sell stuff and have small exhibitions. They also have information about celebration activities throughout the year.
I have been there several times as I am taking an eight week workshop hosted by the city's Arts & History department about Public Art. We meet at the Sesqui shop once a week.
If you are in town, you should check out this month's exhibition of some of Pat Kilby's paintings. I didn't have time to get any pictures of his work. Check the link on his name to see some of his work or go check it out in person. I think it is only up through the end of the month.
He also created three Boise prints that are for sale in the shop.
These are some great collagraph prints of buildings in Boise. They were created in Wingtip Press' workshops to honor Boise's 150 years. Throughout the year, Wingtip will host FREE workshops to create a collagraph print. Anyone can sign up, but you do need to sign up as space is limited. You can see a schedule of the workshops here.