During the exile period in Adrianople “the first pilgrimages were made to the residence [House of Amru’llah, ‘the House of God's Command’] of One Who was now the visible Center of a newly-established Faith -- pilgrimages which by reason of their number and nature, an alarmed government in Persia was first impelled to restrict, and later to prohibit, but which were the precursors of the converging streams of Pilgrims who, from East and West, at first under perilous and arduous circumstances, were to direct their steps towards the prison-fortress of 'Akká -- pilgrimages which were to culminate in the historic arrival of a royal convert at the foot of Mt. Carmel, who, at the very threshold of a longed-for and much advertised pilgrimage, was so cruelly thwarted from achieving her purpose.
(Shoghi Effendi, 'God Passes By')