Can a Victorian style house feature both a Second Empire (Mansard) tower and a turret of the Queen Anne style?

Yes, and there are so many hideous examples of hybrid combinations applied to a style of architecture already notorious for wasted space and gaudy excess in ornamentation.

How about this: https://www.livingplaces.com/architecturalstyles/li/Second_Empire-540x405.jpg ?

Or this: https://cdn.canada247.info/assets/uploads/78733a1aa7cfb7c61cdb3e17e7b8bace_-ontario-hamilton-division-hamilton-durand-durand-parkhtml.jpg ?

Or this: https://www.canstockphoto.com/tower-and-turret-6635293.html ?

Or this: https://i.pinimg.com/originals/c2/d0/80/c2d080aff12c2681d5a78b9ab76e9435.jpg ?

Or this: https://www.gonzalestx.travel/business/jd-houston-house ?

Of course, unless this is a question in an art class.

Thanks, @Zaku That fifth one, of Morey Mansion, is an especially good example—that turret was a little more Russian than Queen Anne, but the Queen Anne Victorian style certainly incorporates these features quite often.

The other examples were more French Norman style than Mansard / Second Empire or Queen Anne—but show how both Queen Anne and Mansard / Second Empire both work with French Norman or Lombard style, Thanks.

Sure. Interesting question.

If anyone still cares about this question, or stumbles upon it, I think I have figured a way that a Second Empire on Mansard tower can go on a Victorian House that also has a Queen Anne style turret.

There are several ways, but the best way would be to have the house on a corner lot, in effect having two facades, one for each street.

The house should have a French Hip roof rather than a Mansard roof but it can still be ‘flat topped; and have the iron trim as a Mansard roof would have.

The tall Second Empire style tower should face the corner. And the Queen Anne turret on the other corner of the mane facade. Some kind of triangular gabled feature could go somewhere between them, or on the other facade instead of the turret.