Both Uses

although
in
Northanger Abbey
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Although our productions have afforded more extensive and unaffected pleasure than those of any other literary corporation in the world, no species of composition has been so much decried.†
Chpt 5 *

although = even though -- used to connect contrasting ideas
Many were the inquiries she was eager to make of Miss Tilney; but so active were her thoughts, that when these inquiries were answered, she was hardly more assured than before, of Northanger Abbey having been a richly endowed convent at the time of the Reformation, of its having fallen into the hands of an ancestor of the Tilneys on its dissolution, of a large portion of the ancient building still making a part of the present dwelling although the rest was decayed, or of its standing low in a valley, sheltered from the north and east by rising woods of oak.†
Chpt 17

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)