Maps and some architectural records microfilmed in 1964 and the majority destroyed; some originals can be found in Series 10. These records consist mostly of maps for the opening and closing of streets but also include bridge designs, railroad and other transportation routes, parks, docks and other harbor construction, general Baltimore maps, Burnt District map (1904), estates, and political subdivisions. There are a large number of architectural drawings consisting of such buildings as the powder house, city spring, City Hall, pump house at Druid Hill Park, Richmond and Lexington Markets, the new court house, Maryland National Guard Armory, and the municipal jail.

There is an index arranged by record number and another index arranged alphabetically by location or subject. These records are on 35mm apperature cards; a number of the originals were salvaged and are currently at the Peale Museum or Baltimore City Archives. Also available on microfilm (BCA 202-15; 1389-1401)

A collection of maps bound together in the nineteenth century. These are original maps submitted to the city register, all copied in Series 2. Most of the maps were completed by George G. Presbury and Jehu Bouldin. An artificial numbering system has been used since some of the maps originally bound in this "atlas" are missing.

Also available on microfilm (BCA 220).

Atlases of maps bound together in the nineteenth century and covering the period 1792 to 1840, with the majority of maps completed in 1820-36. Of these maps only seven are duplicates of maps in Series 2 to 4, although they were probably duplicate copies of original maps as all are of a uniform size (83 x 57 cm) and some sheets contain two or more maps. Most of the maps were completed by Thomas H. Poppleton, Jehu Bouldin, A. J. Bouldin, and Owen Bouldin and concern lot boundaries, construction and extensions of wharves, street and alley openings and extensions, and harbor surveys.

Also available on microfilm (BCA 218, 1273, 1387).

A collection of manuscript and printed maps belonging to the municipal government transferred from temporary storage at the Peale Museum and concerning the following: "Lunn's Lot" and "Howard's Timber Neck" (1782-83); Fells Point (1787); harbor area (1794, 1814, 1819, 1902); Hilton Street (1824); Washington Monument Square (1829); York Avenue (1848); Eutaw Street (1854); general maps of Baltimore (1819, 1912); proposed water supply routes (1853); Swan Lake Aqueduct (1862); Union Railroad (1866); Patterson Park (1899); Lake Chapman and Mt. Royal Reservoir (1867); Baltimore, Chesapeake, and Atlantic Railroad Company (1906); Johns Hopkins Hospital site (n.d.); and airline tunnel from the Gunpowder Falls (n.d.). This series includes five manuscript maps by George C. Presbury, Surveyor of Baltimore County, completed in 1782-87.

An atlas of maps recopied and bound in the midnineteenth century. The first dozen maps by municipal surveyors A. J. Bouldin and Owen Bouldin, 1836-40, were ordered recopied by res. 21 (1837) and res. 45 (1840). The remainder maps are contemporary copies by municipal surveyors Owen Bouldin, 1844-46, 1850, 1854; A. J. Bouldin, 1852; Thomas P. Chiffelle, 1847-55, 1858; and Gilbert H. Bryson, 1854, 1856, 1859-61, 1865-66. These maps all concern alley and street opening and extensions, estate maps, and municipal property.

Also available on microfilm (BCA 220, 1057)

A collection of nineteenth century manuscript copies of early Baltimore maps including surveys for various additions to the town, 1747, 1750, 1754, 1766, 1782-84, 1792; 1730 survey of the original town; 1773 survey of the town; 1786 tax map showing original tracts; 1805 map of "Philpots Addition" used in a chancery court case; 1830 plan of the property of St. Mary's Seminary; and 1848 survey of property adjacent to the Northwest Branch of the Patapsco River.

Also available on microfilm (BCA 220)