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      Background to the Crusades: the Byzantine Empire

      Lesson details

      Learning outcome

      I can describe the position of Byzantium in the 11th century and the problems it faced.

      Key learning points

      1. Byzantium considered itself to be the successor to the Roman Empire.
      2. Byzantium was a Christian empire.
      3. The reign of Justinian I was a high point for the Byzantine Empire.
      4. By the 11th century, the Byzantine Empire had been weakened by a series of internal conflicts.
      5. By the 11th century, Byzantium was facing external threats from the Seljuk Turks.

      Keywords

      • Empire - an empire is a group of territories ruled over by one person or group of people

      • Idolatry - idolatry is the worship of images

      • Iconoclasm - iconoclasm is the destruction of holy images

      • Eastern Orthodox - Eastern Orthodox Christianity was the form of Christianity practised in the Byzantine Empire

      Common misconception

      Towns and cities are called by the same name as they were given when they were founded.

      Towns and cities all over the world have changed their name repeatedly for a wide variety of reasons. For example, York was called Eboracum by the Romans, Eoforwick by the Saxons and Jorvik by the Vikings!

      Teacher tip

      Encourage students to make links between the internal and external problems faced by the Byzantines: get them to consider how one set of problems was exacerbated by another set of issues, e.g. the inadequate army vs the invasions from all sides.

      Content guidance

      Depiction or discussion of sensitive content

      Depiction or discussion of violence or suffering

      Depiction or discussion of violence or suffering

      Supervision

      Adult supervision required

      Licence

      This content is © Oak National Academy Limited (2026), licensed on Open Government Licence version 3.0
      except where otherwise stated. See Oak's terms & conditions
      (Collection 2).

      Lesson video

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      Prior knowledge starter quiz

      6 Questions

      Q1.
      To which city do all the major Abrahamic religions lay claim?

      Correct answer: Jerusalem
      Mecca
      Medina

      Q2.
      Which of the following statements is the best definition of the word emperor?

      a ruler of a single nation
      Correct answer: a ruler of an area often made up of several kingdoms and regions
      a person who inherits this title through birth

      Q3.
      Which of the following statements is the best definition of the word colony?

      Correct answer: an area under the political control of another country
      an area that has political control of itself
      an area that has political control of other areas

      Q4.
      Which of the following statements is the best definition of the word conquest?

      the act of gaining control over a territory or people peacefully
      Correct answer: the act of gaining control over a territory or people through military force
      the desire to be controlled by someone else

      Q5.
      Which of the following statements is the best definition of the word territory?

      an area of land that nobody has control over
      an area with its own local government
      Correct answer: an area of land under the control of a particular government, country or person

      Q6.
      Which of the following were the two main religions of the Roman Empire?

      Correct answer: Christianity
      Islam
      Correct answer: Polytheism
      Judaism

      6 Questions

      Q1.
      This keyword is a group of territories ruled over by one person or group of people.

      Correct Answer: empire, Empire

      Q2.
      Match the words with their definitions. Write the correct letter in each box.

      Correct Answer:Idolatry ,the worship of images
      Correct Answer:Iconoclasm,the destruction of holy images
      Correct Answer:Eastern Orthodox ,the form of Christianity practised in the Byzantine Empire

      Q3.
      Starting with the earliest, sort these events into the order in which they happened.

      1 - City founded as a Greek colony
      2 - Constantine converts to Christianity
      3 - City renamed Constantinople
      4 - Roman Empire splits into East and West
      5 - Western Roman Empire collapses

      Q4.
      Which two of the following weakened the Byzantine Empire from within?

      Correct answer: conflicts over religion
      invasions by Germanic tribes
      Correct answer: violent changes of rulers
      loss of territory in wars

      Q5.
      Whose reign was considered to be a high point for the Byzantine Empire?

      Constantine
      Correct answer: Justinian I
      Caligula

      Q6.
      From whom was Byzantium was facing external threats by the 11th century?

      Correct answer: Seljuk Turks
      Arabic Muslims
      Germanic tribes
      Slavic tribes

      To help you plan your 7 history lesson on: Background to the Crusades: the Byzantine Empire, download all teaching resources for free and adapt to suit your pupils' needs...