Karaköy Güllüoğlu is a famous bakery in Istanbul that specializes in baklava, a sweet pastry made with layers of phyllo dough, chopped nuts, and honey syrup. They have been in business since 1820 and are considered one of the best places to get baklava in Istanbul. In addition to baklava, they also offer a variety of other Turkish pastries and sweets. Karaköy Güllüoğlu has a beautiful and elegant interior, making it a popular spot for special occasions and events.