Vigraharāja IV, also known as and also Visaladev was a king from the Chahamana (Chauhan) dynasty in north-western India, and is generally considered as one of the greatest rulers of the dynasty. He turned the Chahamana kingdom into an empire by subduing the neighbouring kingdoms of Chaulukya, Naddula, and Tomara kingdoms. He also repulsed Muslim invasions, from the Ghaznavid ruler Bahram Shah and defeated Khusrau Shah in Vigraharaja IV's first war against the Muslims.
A coin of Vigraharaja IV. Obverse: Rama standing left, holding bow; “sri ra ma” in Devanagari. Reverse: “Srimad vigra/ha raja de/va” in Devanagari; star and moon symbols below.
Visaladeva inscription on Delhi-Topra pillar, 12th century
The Bisaldeo temple in Bisalpur was constructed by Vigraharaja IV.
Vigraharaja's Sanskrit learning centre was converted into the Adhai Din Ka Jhonpra mosque (pictured) after the Muslim conquest of Ajmer.
Chahamanas of Shakambhari
The Chahamanas of Shakambhari, colloquially known as the Chauhans of Sambhar or Chauhans of Ajmer, were an Indian dynasty that ruled parts of the present-day Rajasthan and neighbouring areas in India, between the 6th and 12th centuries. The territory ruled by them was known as Sapadalaksha. They were the most prominent ruling family of the Chahamana (Chauhan) Rajput clan.
Chahamanas of Shakambhari
Visaladeva inscription on the Delhi-Topra pillar, 12th century.
The Harshnath temple was commissioned by the Chahamana rulers
Bisaldeo temple commissioned by Vigraharaja IV