Editing History of Pittsburgh (section)

===Postwar===
[[David L. Lawrence|David Lawrence]], a Democrat, served as mayor of Pittsburgh from 1946 to 1959 and as Pennsylvania's governor from 1959 to 1963.<ref>Michael P. Weber, ''Don't Call Me Boss: David L. Lawrence, Pittsburgh's  Renaissance Mayor,'' (1988)</ref> Lawrence used his political power to transform Pittsburgh's  political machine into a modern governmental unit that could run the city well and honestly.<ref>Richard Robbins, "David L. Lawrence: The Deft Hand Behind Pittsburgh's – and Pennsylvania's – Politics," ''Pennsylvania Heritage'' 2001 27(4): 22–29</ref>  In 1946  Lawrence decided to enforce the Smoke Control Ordinance of 1941 because he believed smoke abatement was crucial for the city's future economic development. However, enforcement placed a substantial burden on the city's working-class because smoky bituminous coal was much less expensive than smokeless fuels. One round of protests came from Italian-American organizations, which called for delay in enforcing it. Enforcement raised their cost of living and threatened the jobs of their relatives in nearby bituminous coal mines. Despite dislike of the smoke abatement program, Italian Americans strongly supported the reelection of Lawrence in 1949, in part because many of them were on the city payroll.<ref>Stefano Luconi, "The Enforcement of the 1941 Smoke-Control Ordinance and Italian Americans in Pittsburgh," ''Pennsylvania History'' 1999 66(4): 580–594</ref>

{| class="wikitable" style="text-align:right"
|-
!Year
!City Population
!City Rank<ref name="census"/>
|-
|1860
|49,221
|17
|-
|1870
|86,076
|16
|-
|1880
|156,389
|12
|-
|1890
|238,617
|13
|-
|1900
|321,616
|11
|-
|1910
|533,905
|8
|-
|1920
|588,343
|9
|-
|1930
|669,817
|10
|-
|1940
|671,659
|10
|-
|1950
|676,806
|12
|}

{{anchor|Renaissance I}}