* 1228 – Conrad IV of Germany ( d. 1254 )

Rhenish Franconia was the heartland of the Salian dynasty, which provided four emperors in the 11th and 12th centuries: Conrad II, Henry III, Henry IV, and Henry V. Rhenish Franconia contained the ancient cities of Mainz, Speyer, and Worms, the latter two being countships within the hands of the descendants of Conrad the Red ( the Salians ).

After the death of Frederick II in 1250, the German kingdom was divided between his son Conrad IV ( died 1254 ) and the anti-king, William of Holland ( died 1256 ).

Duke Frederick II and Conrad, the two current male Staufer, by their mother Agnes were grandsons of late Emperor Henry IV and nephews of Henry V. Frederick attempted to succeed to the throne of the Holy Roman Emperor ( formally known as the King of the Romans ) through a customary election, but lost to the Saxon duke Lothair of Supplinburg.

As the Welf duke Henry the Proud, son-in-law and heir of Lothair and the most powerful prince in Germany, who had been passed over in the election, refused to acknowledge the new king, Conrad III deprived him of all his territories, giving the Duchy of Saxony to Albert the Bear and that of Bavaria to Leopold IV, Margrave of Austria.

The Great Interregnum, a period in which there were several elected rival kings non of whom was able to achieve any position of authority, followed the death of Frederick's son King Conrad IV of Germany in 1254.

Conrad IV was succeeded as duke of Swabia by his only son, two-year old Conradin.

Like the first ruling Hohenstaufen, Conrad III, also the last one, Conrad IV, was never crowned emperor.

* Conrad IV ( r. 1235-1254 ) King in 1237

* The younger brother, Conrad III, received the burgraviate of Nuremberg from his older brother Frederick IV in 1218, thereby founding the Franconian branch of the House of Hohenzollern.

The next year, Isabella died giving birth to their son Conrad IV, who succeeded his mother to the throne although he never appeared in the east.

In the same year, Innocent excommunicated Frederick II's other son, Conrad IV, King of Germany, but the latter died a few days after the investiture of Edmund.

The four Salian kings of the dynasty — Conrad II, Henry III, Henry IV, and Henry V — ruled the Holy Roman Empire from 1027 to 1125, and firmly established their monarchy as a major European power.

The first Hohenstaufen king Conrad III was a grandson of the Salian Henry IV, Holy Roman Emperor.

** Conrad ( 1087 – 1098, nominal king under his father Henry IV )

* April 25 – Conrad IV of Germany becomes titular King of Jerusalem, with Frederick II, Holy Roman Emperor as regent.

* April 25 – Conrad IV of Germany ( d. 1254 )

* King Conrad IV of Germany invades Italy, but fails to subdue the supporters of Pope Innocent IV.

Both asserted afterwards that Conrad had, in full possession of his mental powers, handed the royal insignia to Frederick and indicated that Frederick, rather than Conrad's own six-year-old son, the future Frederick IV, Duke of Swabia, should succeed him as king.

Innocent was then seeking to detach the Kingdom of Sicily from the Holy Roman Empire ( in the person of Conrad IV of Germany ), and offered it to Charles, after his brother-in-law Richard, Earl of Cornwall had declined it.

* Conrad IV of Germany becomes King of Germany.

* 1028 – Henry III, son of Conrad, is elected king of the Germans.

Later, however, her daughter-in-law, the Byzantine princess Theophano, turned her husband Otto II against his mother, and she was driven from court in 978 ; she lived partly in Italy, and partly with her brother Conrad, king of Burgundy, by whose mediation she was ultimately reconciled to her son ; in 983 Otto appointed her as his viceroy in Italy.

After the Carolingian king Louis the Child died without issue in 911, East Francia did not turn to the Carolingian ruler of West Francia to take over the realm but elected one of the dukes, Conrad of Franconia, as Rex Francorum Orientalum.

On his deathbed, Conrad yielded the crown to his main rival, Henry of Saxony ( r. 919 – 36 ), who was elected king at the Diet of Fritzlar in 919.

When Henry II died in 1024, Conrad II, first of the Salian Dynasty, was then elected king in 1024 only after some debate among dukes and nobles, which would eventually develop into the collegiate of Electors.

Frederick II remained a close ally of the Salians, he and his younger brother Conrad were named the king's representatives in Germany when the king was in Italy.

* Conrad III, king 1138-1152

Conrad was unanimously elected king in April 1192, but was murdered by the Hashshashin only days later.

The Lombard War was over, but the king was still absent, as Conrad never came to the east.

Honorius also sent Cardinal John of Crema to Pisa to hold another synod that excommunicated Archbishop Anselm of Milan, who had crowned Conrad king.

In 1189, they sought to reclaim Tyre for their kingdom, but were refused admission by Conrad, who did not recognize Guy as king.

After the death of the last Saxon Emperor Henry II the first Salian regent Conrad II was elected by the majority of the Prince-electors and was crowned German king in Mainz on 8 September 1024.

Early in 1026 Conrad went to Milan, where Ariberto, archbishop of Milan, crowned him king of Italy.

Already in 1028 Conrad II had his son Henry III elected and anointed king of Germany.

* April 14 – Henry III, son of Conrad II, is elected king of the Germans.

The four major dukes of Germany ( Henry II of Bavaria, Conrad I of Swabia, Henry III of Carinthia, and Bernard I of Saxony ) also paid tribute to the child king.

In 1147 he became Duke of Swabia, and shortly afterwards made his first trip to the East, accompanying his uncle, the German king Conrad III, on the Second Crusade.

* November 24 – Isabella of Jerusalem marries Conrad of Montferrat at Acre, making him de jure king.

His eldest son, Leopold IV, became margrave in 1136, and in 1139 received from the German king Conrad III the duchy of Bavaria, which had been forfeited by Henry the Proud.

After Lothair's death ( December 1137 ), Conrad was elected king at Coblenz on 7 March 1138, in the presence of the papal legate Theodwin.