We demonstrate the ability to fabricate large-scale patterned two-dimensional arrays of identical nanometer size metallic wires with high aspect ratios and packing densities of greater than 3 x 10(9) elements/cm(2). The arrays are made by electrodeposition into nanochannel glass templates. Scanning electron microscopy and tunneling electron microscopy have been used to characterize the nanostructures. Magnetic characterizations of the ferromagnetic wire arrays using a superconducting quantum interference device magnetometer and a magnetic force microscope reveal one-dimensional characteristics with preferred magnetization direction perpendicular to the array film plane and enhanced coercivities compared to the bulk values. Preliminary results on fabrication of nanometer size metallic tubes are also presented.