Once I saw, in a trip in Iasi county, a beautiful old house that belonged to Moldovan boyar family Sturdza, named Sturza Castle, in Miclăușeni, and yes - it is a castle in its entirety. Unfortunately I couldn't get in because of renovations, but the exterior of the house is an ornament wherewith each Boyar and noble family from Moldova and not only in that century would have been proud.
The walls of the castle are carved with the  coat-of-arms of the family, with many simbols that I've seen in history books and in heraldry. The coat-of-arms of Sturdza family is: in the left of the shield- a cross and in right a lion with a sword in hand.  Other symbol of Sturdza Family that I had seen that is a chevron with a chevalier, an common symbol in many noble families of Europe.
The only room (that fortunately was open to visitors) is a room where are  preserved  inscription linked with history of family- inscriptions in Latin, Slavonic and even Arabic. This is a surprising fact about our history.