Baldwin I of Jerusalem in the context of "Second Crusade"

The term Norwegian Realm (Old Norse: *Noregsveldi, Bokmål: Norgesveldet, Nynorsk: Noregsveldet) and Old Kingdom of Norway refer to the Kingdom of Norway's peak of power in the 13th century after a long period of civil war before 1240. The kingdom was a loosely unified nation including the territory of modern-day Norway, modern-day Swedish territory of Jämtland, Herjedalen, Ranrike (Bohuslän) and Idre and Särna, as well as Norway's overseas possessions which had been settled by Norwegian seafarers for centuries before being annexed or incorporated into the kingdom as 'tax territories'. To the North, Norway also bordered extensive tax territories on the mainland. Norway, whose expansionism starts from the very foundation of the Kingdom in 872, reached the peak of its power in the years between 1240 and 1319.

At the peak of Norwegian expansion before the civil war (1130–1240), Sigurd I led the Norwegian Crusade (1107–1110). The crusaders won battles in Lisbon and the Balearic Islands. In the Siege of Sidon they fought alongside Baldwin I and Ordelafo Faliero, and the siege resulted in an expansion of the Kingdom of Jerusalem. Leif Erikson, an Icelander of Norwegian origin and official hirdman of King Olaf I of Norway, explored America 500 years before Columbus. Adam of Bremen wrote about the new lands in Gesta Hammaburgensis ecclesiae pontificum (1076) when meeting Sweyn I of Denmark, but no other sources indicate that this knowledge went farther into Europe than Bremen, Germany. The Kingdom of Norway was the second European country after England to enforce a unified code of law to be applied for the whole country, called Magnus Lagabøtes landslov (1274).

The County of Tripoli (1102–1289) was one of the Crusader states. It was founded in the Levant in the modern-day region of Tripoli, northern Lebanon and parts of western Syria.When the Frankish Crusaders, mostly southern French forces – captured the region in 1109, Bertrand of Toulouse became the first count of Tripoli as a vassal of King Baldwin I of Jerusalem. From that time on, the rule of the county was decided not strictly by inheritance but by factors such as military force (external and civil war), favour and negotiation. In 1289, the County of Tripoli fell to the Muslim Mamluks of Cairo under Sultan Qalawun, and the county was absorbed into Mamluk Sultanate.

The principality of Galilee was one of the four major seigneuries of the crusader Kingdom of Jerusalem, according to 13th-century commentator John of Ibelin, grandson of Balian. The direct holdings of the principality centred around Tiberias, in Galilee proper, but with all its vassals, the lordship covered all Galilee (now Israel) and southern Phoenicia (today Lebanon). The independent Lordship of Sidon was located between Galilee's holdings. The principality also had its own vassals, the lordships of Nazareth and Haifa.

The principality was established, at least in name, in 1099 when Tancred was given Tiberias, Haifa, and Bethsan by Godfrey of Bouillon. In 1101, Baldwin I limited Tancred's power by giving Haifa to Geldemar Carpenel, and Tancred was forced to give up the principality and become regent in Antioch. The principality became the fief of the families of St. Omer, Montfaucon (Falcomberques), and then Bures, and its main seat was in Tiberias; thus it was sometimes also called the Principality of Tiberias or the Tiberiad. The principality was destroyed by Saladin in 1187, although the title was used by relatives and younger sons of the kings of Cyprus (the titular kings of Jerusalem) afterwards, and some of its former holdings were briefly reclaimed by a treaty made during the Barons' Crusade.

The king or queen of Jerusalem was the supreme ruler of the Kingdom of Jerusalem, a Crusader state founded in Jerusalem by the Latin Catholic leaders of the First Crusade, when the city was conquered in 1099. Most of them were men, but there were also five queens regnant of Jerusalem, either reigning alone suo jure ("in her own right"), or as co-rulers of husbands who reigned as kings of Jerusalem jure uxoris ("by right of his wife").

Godfrey of Bouillon, the first ruler of the Kingdom of Jerusalem, refused the title of king choosing instead the title Advocatus Sancti Sepulchri, that is Advocate or Defender of the Church of the Holy Sepulchre. In 1100 Baldwin I, Godfrey's successor, was the first ruler crowned as king. The crusaders in Jerusalem were conquered in 1187, but their Kingdom of Jerusalem survived, moving the capital to Acre in 1191. Crusaders re-captured the city of Jerusalem in the Sixth Crusade, during 1229–1239 and 1241–1244.

The siege of Sidon was an event in the aftermath of the First Crusade. The coastal city of Sidon was captured by the forces of Baldwin I of Jerusalem and Sigurd I of Norway, with assistance from the Ordelafo Faliero, Doge of Venice.

Adelaide del Vasto (Adelasia, Azalaïs) (c. 1075 – 16 April 1118) was countess of Sicily as the third spouse of Roger I of Sicily, and Queen consort of Jerusalem by marriage to Baldwin I of Jerusalem. She served as regent of Sicily during the minority of her son Roger II of Sicily from 1101 until 1112.

Her rule occurred between the previous reign of multiple Arabian dynasties and the formal declaration of the Kingdom of Sicily, placing her between two massive shifts in Sicilian identity. Under Adelaide, the economic and social shifts of Norman conquest led to many rebellions and societal tension, which she handled with frightening swiftness.

Godehilde of Tosny (or Godevere, died 1097) was a Norman noblewoman of the House of Tosny and the first wife of Baldwin I of Jerusalem. She was the daughter of Raoul II of Tosny, a companion of William the Conqueror, and Isabel of Conches. Her husband took her along with him on the First Crusade, resulting in her untimely death.