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 <div style="float:right;width:196px;padding:3px">[[Image:Beyazid I.jpg]]</div>
 
''' Beyazid I ''' (ca [[1354]] - [[1403]]; Bayez&#x131;t, nicknamed ''Y&#x131;ld&#x131;r&#x131;m'', the 'Thunderbolt') was the [[sultan]] of the [[Ottoman Empire]] from [[1389]] to [[1402]]. He ascended to the throne following the assassination of his father [[Murad I]] and immediately had his younger brother strangled to prevent him from staging a coup. 
 
 In revenge for the assassination of Murad in the [[Battle of Kosovo]], Beyazid massacred his [[Serb]] prisoners. Nevertheless, he was able to conclude a treaty with the Serb leader, [[Stephen Bulcovic]], and granted [[Serbia]] considerable autonomy. In [[1391]] he laid siege to [[Constantinople]]. On the demand of the [[Byzantine]] emperor [[John V Palaeologus]] a new [[crusade]] was organized to defeat Beyazid. In [[1396]], the [[Christian]] allies, under the leadership of the [[Hungary|Hungarian]] King and Holy Roman Emperor [[Sigismund, Holy Roman Emperor|Sigismund]], was defeated in the [[Battle of Nicopolis]]. The siege of [[Constantinople]] lasted until [[1398]] when the [[Byzantines]] paid a considerable tribute to break the siege. 
 
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 <div style="float:right;width:196px;padding:3px">[[Image:Beyazid I.jpg]]</div>
 
''' Beyazid I ''' (ca [[1354]] - [[1403]]; Bayez&#x131;t, nicknamed ''Y&#x131;ld&#x131;r&#x131;m'', the 'Thunderbolt') was the [[sultan]] of the [[Ottoman Empire]] from [[1389]] to [[1402]]. He ascended to the throne following the assassination of his father [[Murad I]] and immediately had his younger brother Yakub strangled to prevent him from staging a coup. 
 
 In revenge for the assassination of Murad in the [[Battle of Kosovo]], Beyazid massacred his [[Serb]] prisoners. Nevertheless, he was able to conclude a treaty with the Serb leader, [[Stephen Bulcovic]], and granted [[Serbia]] considerable autonomy. In [[1391]] he laid siege to [[Constantinople]]. On the demand of the [[Byzantine]] emperor [[John V Palaeologus]] a new [[crusade]] was organized to defeat Beyazid. In [[1396]], the [[Christian]] allies, under the leadership of the [[Hungary|Hungarian]] King and Holy Roman Emperor [[Sigismund, Holy Roman Emperor|Sigismund]], was defeated in the [[Battle of Nicopolis]]. The siege of [[Constantinople]] lasted until [[1398]] when the [[Byzantines]] paid a considerable tribute to break the siege. 
 
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