Built in 1824,24 Middagh Streetis a charming, wood-frame, Federal house in Brooklyn Heights that has the distinction of being the oldest home in the neighborhood. And it’s just gotten a price chop to $6,650,000 (it first listed this past September for the first time in nearly 60 years, asking $7 million). The listing says most of the original interior details — like wood floors, fireplaces, and moldings — are intact, and the five-bedroom residence even comes with a landscaped backyard and separate, two-bedroom carriage house.