The pillars of Ashoka are a series of monolithic columns dispersed throughout the Indian subcontinent, erected—or at least inscribed with edicts—by the 3rd Mauryan Emperor Ashoka the Great, who reigned from c. 268 to 232 BC. Ashoka used the expression Dhaṃma thaṃbhā (Dharma stambha), i.e. "pillars of the Dharma" to describe his own pillars. These pillars constitute important monuments of the architecture of India, most of them exhibiting the characteristic Mauryan polish.