According to Fleming, those who question whether the term Hindu and Hinduism are a modern construction in a religious context present their arguments based on some texts that have survived into the modern era, either of Islamic courts or of literature published by Western missionaries or colonial-era Indologists aiming for a reasonable construction of history. However, the existence of non-textual evidence such as cave temples separated by thousands of kilometers, as well as lists of medieval era pilgrimage sites, is evidence of a shared sacred geography and existence of a community that was self-aware of shared religious premises and landscape. Further, it is a norm in evolving cultures that there is a gap between the "lived and historical realities" of a religious tradition and the emergence of related "textual authorities". The tradition and temples likely existed well before the medieval era Hindu manuscripts appeared that describe them and the sacred geography. This, states Fleming, is apparent given the sophistication of the architecture and the sacred sites along with the variance in the versions of the Puranic literature. According to Diana L. Eck and other Indologists such as André Wink, Muslim invaders were aware of Hindu sacred geography such as Mathura, Ujjain, and Varanasi by the 11th-century. These sites became a target of their serial attacks in the centuries that followed.