<Table> <Tr> <Th_colspan="2"> Mosque of Ibn Tulun </Th> </Tr> <Tr> <Td_colspan="2"> Minaret and ablution fountain (sabil) of the Ibn Tulun Mosque </Td> </Tr> <Tr> <Td_colspan="2"> Shown within Egypt </Td> </Tr> <Tr> <Th_colspan="2"> Basic information </Th> </Tr> <Tr> <Th> Location </Th> <Td> Cairo, Egypt </Td> </Tr> <Tr> <Th> Geographic coordinates </Th> <Td> 30 ° 01 ′ 44" N 31 ° 14 ′ 58" E ﻿ / ﻿ 30.02889 ° N 31.24944 ° E ﻿ / 30.02889; 31.24944 Coordinates: 30 ° 01 ′ 44" N 31 ° 14 ′ 58" E ﻿ / ﻿ 30.02889 ° N 31.24944 ° E ﻿ / 30.02889; 31.24944 </Td> </Tr> <Tr> <Th> Affiliation </Th> <Td> Islam </Td> </Tr> <Tr> <Th> Year consecrated </Th> <Td> 884 </Td> </Tr> <Tr> <Th_colspan="2"> Architectural description </Th> </Tr> <Tr> <Th> Architectural type </Th> <Td> Mosque </Td> </Tr> <Tr> <Th> Architectural style </Th> <Td> Abbasid </Td> </Tr> <Tr> <Th> Founder </Th> <Td> Ahmed ibn Tulun </Td> </Tr> <Tr> <Th> Completed </Th> <Td> 879 </Td> </Tr> <Tr> <Th_colspan="2"> Specifications </Th> </Tr> <Tr> <Th> Dome (s) </Th> <Td> </Td> </Tr> <Tr> <Th> Minaret (s) </Th> <Td> </Td> </Tr> <Tr> <Th> Materials </Th> <Td> brick </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Mosque of Ibn Tulun </Th> </Tr>

When was the mosque of ibn tulun built