What changes were caused by one of the effects of Guru Arjan's leadership in Sikhism?

Answer:

Followings events took place during the times of Guru Arjan Dev Ji:

  1. Made a huge contribution in the number of hymns & finalisation of the Guru Granth Sahib.
  2. Guru Ji contributed a total of 2218 hymns to the Sri Guru Granth Sahib.
  3. Author of Sukhmani Sahib Bani - Prayer for Peace
  4. Compiled and installed for the first time the holy Sikh Book, which at this stage is called Adi Granth, a major achievement.
  5. Built the Golden Temple
  6. Developed Amritsar as a Centre of Excellence.
  7. Enhanced the Structure of Sikh Society by introducing the Masund system
  8. First Sikh Guru to be martyred.
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