Lejondals slott, Manor house in Bro, Sweden.

Lejondals slott is a manor house on the western shore of Lejondalssjön, designed by Isak Gustaf Clason and built mainly between 1889 and 1891. The red-painted stone building has two storeys under a steep slate roof, a round corner tower topped by a lantern, and a lower angled wing to the north with a second round tower. Its details draw on the Vasa Renaissance and on French Loire châteaux.

The manor traces back to Queen Philippa of England, who owned the estate in the 1400s when it was called Bro-Lövsta, before the Lejonhuvud family renamed it. That name change established the identity that endures today.

The name Lejondal comes from Erik Abrahamsson Leijonhuvud, who renamed the estate after himself in the 17th century; before that it was Bro-Lövsta. Above the recessed main portal are the Sparre and De Geer coats of arms with the motto Exempla Avita Seqvendo, and Louise De Geer's wedding monogram is in the ceiling of the Blue Dining Room.

The castle stands on the western shore of Lejondalssjön in Bro socken, Upplands-Bro kommun, and is run as a conference venue that also takes private guests and hosts weddings. The older yellow manor house and the early-20th-century stables and outbuildings lie just north of the main building. Lejondals Ryttarförening, a dressage club founded in 1994, uses the indoor riding hall built that year.

The castle's main portal is set back under an arcade and carries the coats of arms of the De Geer and Sparre families with the motto Exempla Avita Seqvendo, 'By following the examples of the ancestors'. Louise De Geer's wedding monogram is painted on the ceiling of the Blue Dining Room.