It may seem like a sign of changing times when the Yamba Boutique cannabis shop opens in what is often referred to as Harvard Square’s “Carriage House.” It is to the store’s owner, Leah Samura.

“The fact that it was a police station before it was a carriage house, you know for me just brings it full circle,” said Samura, delighted that the historic home of local law enforcement charged with prohibiting marijuana possession would turn into a site for cannabis education and sales.