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Photo: Michal Valach, CC BY-SA 4.0 via Wikimedia Commons
The name of this handicraft museum translates to Buhalov's Inn, as the building first was built as an inn. There are for instance wool toys, lace, and woodcarvings on display. Also, the decorated building with the second floor coming out of the building a bit is indeed an attraction in itself (it includes a café with nice views of the mountains). The staff of the souvenir shop act as guides and most speak English.
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Къща "Райно Попович"
The home of teacher Raino Popovich who in 1826 opened the first school in Karlovo where lessons were taught in Bulgarian. All the local revolutionaries studied here. Visitors can try printing something on the old printing press in the house.
Успение Богородично
A small stone church from 1851, with a blue and white bell tower added in 1897, and a mural of Levski on the northern wall.
Старинно Карлово
This museum is a set of traditional houses with restored interiors. Most require a little effort to visit, there are signs outside each of them with a description of what's displayed on the inside and contact information of the caretaker. To see the indoors, you need to contact them to come and open the house and pay a fee of a couple of leva.
Finished in 1903, the memorial of the national hero is one of the main sights in Karlovo. It looks a bit strange as Levski is pointing his revolver directly at the onlookers. The roaring lion next to him refers both to the translation of Levski's name ("lion-like") and lions being the heraldic animal of Bulgaria.