Both Uses

although
in
The Horse and His Boy
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Although they're king and queen, they're brother and sister, not married to one another.†
Chpt 4

although = even though -- used to connect contrasting ideas
Although Lasaraleen had said she was dying to hear Aravis's story, she showed no sign of really wanting to hear it at all.†
Chpt 7 *

Definitions:

(1) (although)
even though -- used to introduce an idea that contrasts with or makes the main statement surprising

At the start of a sentence, although can play a role similar to words like however, yet, still, even so, on the other hand, or nonetheless—all of which signal contrast. In the middle of a sentence, although can sometimes be used where but or though might also work, but though or but often sound more natural. For example, "She's a great teacher, though not the most popular" is usually smoother than "She's a great teacher, although not the most popular."
(2) (meaning too rare to warrant focus)