includes the Virgin of Zacatecas image. However, since then it has been claimed that the new logo violates Article 5 of the Zacatecas constitution and Article 10 of a law called Bando de Policía y Buen Gobierno. Another objection is that the new seal contains the colors yellow and black, those of the political party of the municipal president. The city has grown to the point where houses now balance on the edge of a creek and over the mounds of waste from mines. This is possible due to the lack of regulation and urban planning by authorities. Irregularities exist in 85% of the city's neighborhoods but the neighborhoods of Lázaro Cárdenas, Minera, CNOP, Lomas de la Pimienta, Benito Juárez, González Ortega have the largest number of them. Many of these buildings have structural and infrastructure problems such as flooding during rains and the damage this creates. The city The city is called "con rostro de cantera rosa y corazón de plata" (with a face of pink stone and a heart of silver) because of the pink stone that many of its iconic buildings are made of and the silver that has spurred its development and history. Like other mining cities in Mexico, such as Guanajuato and Taxco, the city was built near the mines on very rough terrain. It is at the foot of the Cerro de la Bufa, in which was one of the greatest silver mines in the world. Instead of having an orderly plan of streets, the Spanish settlement followed the old Indian neighborhoods with narrow streets and alleys squeezed into a large ravine or "cañada". Without attempting to modify the rough terrain, development also ran up the hills. The main road through town aligns north–south along the Arroyo de la Plata, with the rest of the city filled with small winding alleys and streets and tiny plazas. Many of the alleys have names that refer to local legends, such as the "Callejón del Indio Triste" (Alley of the Sad Indian) and "Callejón del Mono Prieto" (Alley of the Dark Monkey). The only really open space is the main plaza. Even here, it is not possible to stand back far enough to see the whole Baroque façade of the main cathedral. Around the city are the Brittany hills or small mountains that contain silver and other minerals such as the Cerro de la Virgen, Cerro de