Lupoglav was first mentioned in a written document in 1064. It was the deed of donation by King Henry IV where Lupoglav was mentioned as Lompaga; the Castrum de Lupoglau was mentioned in 1264 when it was granted in fealty to Henry of Pazin by the Patriarch of Aquileia. Since then Lupoglav experienced the same situation as the County of Pazin, first under the rule of the Counts of Gorizia and then of the Austrian Empire. The Castle was inhabited by castellans from various feudal families: the Ebersteins, the Herbersteins, the Kružićs, the Sinkovićs and the Eggenbergs. Sparse but however numerous historical records have been preserved from those times, some of them feature even romantic episodes. Thus it was recorded that Ana, the last heir of the Eberstein family remained widowed at the age of 22 and a powerful Styrian squire Ernest Lobmig hired a young Pazin captain Gunter Herberstein to ask Ana's hand in marriage on his behalf.
However, the young Herberstein fell in love at first sight and, forgetting his mission, proposed himself and Ana gladly accepted his proposal. The hurt squire Lobming occupied the Castle where the wedding was held the very next day and took the newlyweds in captivity in the Eppenstein Castle. They were released after a few months following an intercession by the Austrian Duke Ernest. It was also recorded that one of the heirs of the Lupoglav estate, Georg Herberstein, had a nervous breakdown in Neustadt, and put a saddle on his head instead of a helmet, jumped off his horse and forced his servants to do the same and follow him to Lupoglav. This incident was blamed upon an old peasant woman who, after being accused of witchcraft, was locked in a tower, where she died thus avoiding burning at the stake. The most famous issue of the Herberstein Family, who remained at Lupoglav for more than 150 years, was by all means Sigismund Herberstein (1486-1566), a soldier, diplomat and writer, a man who travelled twice to Russia as the Emperor's emissary.
His descriptions of the travels were published in 1549 and were the first to make Russia more familiar to the Europeans. Despite being born in Vipava, he spent most of his life in Vienna, where he was remembered for an episode that occurred during the Venice War in 1510. Upon hearing that the Venetians were besieging Pazin, as commander of the Austrian cavalry he decided not to ride to Graz to ask for help, but together with his 14 horsemen he assaulted Pazin directly from Lupoglav. He lifted the siege and consolidated the town defence preventing Venice from occupying Pazin. One of the owners of the Lupoglav Castle was a Captain from Senj, Petar Kružić, who excelled in the war against the Ottoman invaders and died in 1537 commanding the defence of Klis. At the beginning of the 17th century, the Castle of Lupoglav, then owned by, Ivan Sinkovich, also from Senj, provides a safe haven for a great number of Uskok soldiers. Under his lead these soldiers raided the neighbouring Venetian areas (Roč, Buzet, Rašpor). Ten years after Sinković's death, the estate was sold by Ferdinand of Austria to Count Eggenberg. After his death the new owner became Count Brigido from the beginning of our story. He decided to abandon the old Mahrenfels Castle, built on a difficult to access hill, and to build a new one in the plain.